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Diff for /mandoc/TODO between version 1.113 and 1.189

version 1.113, 2011/06/18 17:58:48 version 1.189, 2014/11/26 21:40:17
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 * $Id$  * $Id$
 ************************************************************************  ************************************************************************
   
 ************************************************************************  Many issues are annotated for difficulty as follows:
 * parser bugs  
 ************************************************************************  
   
 - .TP before .SH is still FATAL in man(7)   - loc = locality of the issue
   reported by brad@  Sat, 15 Jan 2011 15:54:54 -0500      *    single file issue, affects file only, or very few
       **   single module issue, affects several files of one module
       ***  cross-module issue, significantly impacts multiple modules
            and may require substantial changes to internal interfaces
    - exist = difficulty of the existing code in this area
       *    affected code is straightforward and easy to read and change
       **   affected code is somewhat complex, but once you understand
            the design, not particularly difficult to understand
       ***  affected code uses a special, exceptionally tricky design
    - algo = difficulty of the new algorithm to be written
       *    the required logic and code is straightforward
       **   the required logic is somewhat complex and needs a careful design
       ***  the required logic is exceptionally tricky,
            maybe an approach to solve that is not even known yet
    - size = the amount of code to be written or changed
       *    a small number of lines (at most 100, usually much less)
       **   a considerable amount of code (several dozen to a few hundred)
       ***  a large amount of code (many hundreds, maybe thousands)
    - imp = importance of the issue
       *    mostly for completeness
       **   would be nice to have
       ***  issue causes considerable inconvenience
   
   Obviously, as the issues have not been solved yet, these annotations
   are mere guesses, and some may be wrong.
   
 ************************************************************************  ************************************************************************
 * formatter bugs  * crashes
 ************************************************************************  ************************************************************************
   
 - tbl(7): Horizontal and vertical lines are formatted badly:  - The abort() in bufcat(), html.c, can be triggered via buffmt_includes()
   With the box option, there is too much white space at the end of cells.    by running -Thtml -Oincludes on a file containing a long .In argument.
   Horizontal lines from "=" lines are a bit too long.    Fixing this will probably require reworking the whole bufcat() concept.
   yuri dot pankov at gmail dot com  Thu, 14 Apr 2011 05:45:26 +0400    loc **  exist *  algo *  size **  imp **
   
 ************************************************************************  ************************************************************************
 * missing features  * missing features
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   .na   -- temporarily disable adjustment without changing the mode    .na   -- temporarily disable adjustment without changing the mode
   .ad   -- re-enable adjustment without changing the mode    .ad   -- re-enable adjustment without changing the mode
   Adjustment mode is ignored while in no-fill mode (.nf).    Adjustment mode is ignored while in no-fill mode (.nf).
     loc ***  exist ***  algo **  size **  imp **  (parser reorg would help)
   
 - .it (line traps) occur in mysql(1), yasm_arch(7)  - .fc (field control)
   generated by DocBook XSL Stylesheets v1.71.1 <http://docbook.sf.net/>    found by naddy@ in xloadimage(1)
   reported by brad@  Sat, 15 Jan 2011 15:48:18 -0500    loc **  exist ***  algo *  size *  imp *
   
   - .nr third argument (auto-increment step size, requires \n+)
     found by bentley@ in sbcl(1)  Mon, 9 Dec 2013 18:36:57 -0700
     loc *  exist *  algo *  size *  imp **
   
 - .ns (no-space mode) occurs in xine-config(1)  - .ns (no-space mode) occurs in xine-config(1)
   reported by brad@  Sat, 15 Jan 2011 15:45:23 -0500    reported by brad@  Sat, 15 Jan 2011 15:45:23 -0500
     loc ***  exist ***  algo ***  size **  imp *
   
 - xloadimage(1) wants .ti (temporary indent), rep by naddy@  
   
 - .ta (tab settings) occurs in ircbug(1) and probably gnats(1)  - .ta (tab settings) occurs in ircbug(1) and probably gnats(1)
   reported by brad@  Sat, 15 Jan 2011 15:50:51 -0500    reported by brad@  Sat, 15 Jan 2011 15:50:51 -0500
     also Tcl_NewStringObj(3) via wiz@  Wed, 5 Mar 2014 22:27:43 +0100
     loc **  exist ***  algo **  size **  imp **
   
 - pod2man expects `tr' to be implemented for \*(-- to work  - .ti (temporary indent)
     found by naddy@ in xloadimage(1)
     found by bentley@ in nmh(1)  Mon, 23 Apr 2012 13:38:28 -0600
     loc **  exist **  algo **  size *  imp ** (parser reorg helps a lot)
   
 - \c (interrupted text) occurs in chat(8)  - .while and .shift
     found by jca@ in ratpoison(1)  Sun, 30 Jun 2013 12:01:09 +0200
     loc *  exist **  algo **  size **  imp **
   
   - \c (interrupted text) should prevent the line break
     even inside .Bd literal; that occurs in chat(8)
     also found in cclive(1) - DocBook output
     loc **  exist ***  algo **  size *  imp *
   
   - \h horizontal move
     found in cclive(1) DocBook output
     Anthony J. Bentley on discuss@  Sat, 21 Sep 2013 22:29:34 -0600
     loc **  exist **  algo **  size *  imp ** (parser reorg helps a lot)
   
   - \n+ and \n- numerical register increment and decrement
     found by bentley@ in sbcl(1)  Mon, 9 Dec 2013 18:36:57 -0700
     loc *  exist *  algo *  size *  imp **
   
   - \w'' improve width measurements
     would not be very useful without an expression parser, see below
     needed for Tcl_NewStringObj(3) via wiz@  Wed, 5 Mar 2014 22:27:43 +0100
     loc **  exist ***  algo ***  size *  imp ***
   
   - using undefined strings or macros defines them to be empty
     wl@  Mon, 14 Nov 2011 14:37:01 +0000
     loc *  exist *  algo *  size *  imp *
   
 --- missing mdoc features ----------------------------------------------  --- missing mdoc features ----------------------------------------------
   
 - fix bad block nesting involving multiple identical explicit blocks  - fix bad block nesting involving multiple identical explicit blocks
   see the OpenBSD mdoc_macro.c 1.47 commit message    see the OpenBSD mdoc_macro.c 1.47 commit message
     loc *  exist ***  algo ***  size *  imp **
   
 - .Bl -column .Xo support is missing  - .Bl -column .Xo support is missing
   ultimate goal:    ultimate goal:
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Line 118 
   lib/libc/compat-43/sigvec.3    lib/libc/compat-43/sigvec.3
   lib/libc/gen/signal.3    lib/libc/gen/signal.3
   lib/libc/sys/sigaction.2    lib/libc/sys/sigaction.2
     loc *  exist ***  algo ***  size *  imp **
   
 - edge case: decide how to deal with blk_full bad nesting, e.g.  - edge case: decide how to deal with blk_full bad nesting, e.g.
   .Sh .Nm .Bk .Nm .Ek .Sh found by jmc@ in ssh-keygen(1)    .Sh .Nm .Bk .Nm .Ek .Sh found by jmc@ in ssh-keygen(1)
   from jmc@  Wed, 14 Jul 2010 18:10:32 +0100    from jmc@  Wed, 14 Jul 2010 18:10:32 +0100
     loc *  exist ***  algo ***  size **  imp **
   
 - \\ is now implemented correctly  - \\ is now implemented correctly
   * when defining strings and macros using .ds and .de    * when defining strings and macros using .ds and .de
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   because libmdoc does not yet use mandoc_getarg().    because libmdoc does not yet use mandoc_getarg().
   Also check what happens in plain text, it must be identical to \e.    Also check what happens in plain text, it must be identical to \e.
   
   - .Bd -centered implies -filled, not -unfilled, which is not
     easy to implement; it requires code similar to .ce, which
     we don't have either.
     Besides, groff has bug causing text right *before* .Bd -centered
     to be centered as well.
     loc ***  exist ***  algo **  size **  imp **  (parser reorg would help)
   
 - .Bd -filled should not be the same as .Bd -ragged, but align both  - .Bd -filled should not be the same as .Bd -ragged, but align both
   the left and right margin.  In groff, it is implemented in terms    the left and right margin.  In groff, it is implemented in terms
   of .ad b, which we don't have either.  Found in cksum(1).    of .ad b, which we don't have either.  Found in cksum(1).
     loc ***  exist ***  algo **  size **  imp **  (parser reorg would help)
   
 - implement blank `Bl -column', such as  - implement blank `Bl -column', such as
   .Bl -column    .Bl -column
   .It foo Ta bar    .It foo Ta bar
   .El    .El
     loc *  exist ***  algo ***  size *  imp *
   
 - explicitly disallow nested `Bl -column', which would clobber internal  - explicitly disallow nested `Bl -column', which would clobber internal
   flags defined for struct mdoc_macro    flags defined for struct mdoc_macro
     loc *  exist *  algo *  size *  imp **
   
 - In .Bl -column .It, the end of the line probably has to be regarded  - In .Bl -column .It, the end of the line probably has to be regarded
   as an implicit .Ta, if there could be one, see the following mildly    as an implicit .Ta, if there could be one, see the following mildly
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     Default search path.      Default search path.
   reported by Michal Mazurek <akfaew at jasminek dot net>    reported by Michal Mazurek <akfaew at jasminek dot net>
   via jmc@ Thu, 7 Apr 2011 16:00:53 +0059    via jmc@ Thu, 7 Apr 2011 16:00:53 +0059
     loc *  exist ***  algo **  size *  imp **
   
 - inside `.Bl -column' phrases, punctuation is handled like normal  - inside `.Bl -column' phrases, punctuation is handled like normal
   text, e.g. `.Bl -column .It Fl x . Ta ...' should give "-x -."    text, e.g. `.Bl -column .It Fl x . Ta ...' should give "-x -."
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   but should give "ab ."    but should give "ab ."
   
 - set a meaningful default if no `Bl' list type is assigned  - set a meaningful default if no `Bl' list type is assigned
     loc *  exist *  algo *  size *  imp **  (already done?)
   
 - have a blank `It' head for `Bl -tag' not puke  - have a blank `It' head for `Bl -tag' not puke
     loc *  exist *  algo *  size *  imp **  (already done?)
   
   - check whether it is correct that `D1' uses INDENT+1;
     does it need its own constant?
     loc *  exist **  algo **  size *  imp **
   
 - prohibit `Nm' from having non-text HEAD children  - prohibit `Nm' from having non-text HEAD children
   (e.g., NetBSD mDNSShared/dns-sd.1)    (e.g., NetBSD mDNSShared/dns-sd.1)
   (mdoc_html.c and mdoc_term.c `Nm' handlers can be slightly simplified)    (mdoc_html.c and mdoc_term.c `Nm' handlers can be slightly simplified)
   
   - support translated section names
     e.g. x11/scrotwm scrotwm_es.1:21:2: error: NAME section must be first
     that one uses NOMBRE because it is spanish...
     deraadt tends to think that section-dependent macro behaviour
     is a bad idea in the first place, so this may be irrelevant
     loc **  exist **  algo **  size *  imp **
   
 - When there is free text in the SYNOPSIS and that free text contains  - When there is free text in the SYNOPSIS and that free text contains
   the .Nm macro, groff somehow understands to treat the .Nm as an in-line    the .Nm macro, groff somehow understands to treat the .Nm as an in-line
   macro, while mandoc treats it as a block macro and breaks the line.    macro, while mandoc treats it as a block macro and breaks the line.
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   should be, needs investigation.    should be, needs investigation.
   uqs@  Thu, 2 Jun 2011 11:03:51 +0200    uqs@  Thu, 2 Jun 2011 11:03:51 +0200
   uqs@  Thu, 2 Jun 2011 11:33:35 +0200    uqs@  Thu, 2 Jun 2011 11:33:35 +0200
     loc *  exist **  algo ***  size *  imp **
   
 --- missing man features -----------------------------------------------  --- missing man features -----------------------------------------------
   
 - groff an-ext.tmac macros (.UR, .UE) occur in xine(5)  - -T[x]html doesn't stipulate non-collapsing spaces in literal mode
   reported by brad@  Sat, 15 Jan 2011 15:45:23 -0500  
   
 --- missing tbl features -----------------------------------------------  --- missing tbl features -----------------------------------------------
   
 - implement basic non-parametric .de to support e.g. sox(1)  - look at the POSIX manuals in the books/man-pages-posix port,
   reported by naddy@ Sat, 16 Oct 2010 23:51:57 +0200    they use some unsupported tbl(7) features.
   *** sox(1) still doesn't work, tbl(1) errors need investigation    loc *  exist **  algo **  size **  imp ***
   
   - use Unicode U+2500 to U+256C for table borders
     in tbl(7) -Tutf-8 output
     suggested by bentley@  Tue, 14 Oct 2014 04:10:55 -0600
     loc *  exist **  algo *  size *  imp **
   
 - allow standalone `.' to be interpreted as an end-of-layout  - allow standalone `.' to be interpreted as an end-of-layout
   delimiter instead of being thrown away as a no-op roff line    delimiter instead of being thrown away as a no-op roff line
   reported by Yuri Pankov, Wed 18 May 2011 11:34:59 CEST    reported by Yuri Pankov, Wed 18 May 2011 11:34:59 CEST
     loc **  exist **  algo **  size *  imp **
   
   --- missing eqn features -----------------------------------------------
   
   - The "size" keyword is parsed, but ignored by the formatter.
     loc *  exist *  algo *  size *  imp *
   
   - The spacing characters `~', `^', and tab are currently ignored,
     see User's Guide (Second Edition) page 2 section 4.
     loc *  exist *  algo **  size *  imp **
   
   - Mark and lineup are parsed and ignored,
     see User's Guide (Second Edition) page 5 section 15.
     loc **  exist **  algo **  size **  imp **
   
 --- missing misc features ----------------------------------------------  --- missing misc features ----------------------------------------------
   
   - italic correction (\/) in PostScript mode
     Werner LEMBERG on groff at gnu dot org  Sun, 10 Nov 2013 12:47:46
     loc **  exist **  algo *  size *  imp *
   
   - When makewhatis(8) encounters a FATAL parse error,
     it silently treats the file as formatted, which makes no sense
     at all for paths like man1/foo.1 - and which also contradicts
     what the manual says at the end of the description.
     The end result will be ENOENT for file names returned
     by mansearch() in manpage.file.
     loc *  exist *  algo *  size *  imp **
   
   - makewhatis(8) for preformatted pages:
     parse the section number from the header line
     and compare to the section number from the directory name
     loc *  exist *  algo *  size *  imp **
   
   - Does makewhatis(8) detect missing NAME sections, missing names,
     and missing descriptions in all the file formats?
     loc *  exist *  algo *  size *  imp ***
   
 - clean up escape sequence handling, creating three classes:  - clean up escape sequence handling, creating three classes:
   (1) fully implemented, or parsed and ignored without loss of content    (1) fully implemented, or parsed and ignored without loss of content
   (2) unimplemented, potentially causing loss of content    (2) unimplemented, potentially causing loss of content
       or serious mangling of formatting (e.g. \n) -> ERROR        or serious mangling of formatting (e.g. \n) -> ERROR
       see textproc/mgdiff(1) for nice examples        see textproc/mgdiff(1) for nice examples
   (3) undefined, just output the character -> perhaps WARNING    (3) undefined, just output the character -> perhaps WARNING
     loc ***  exist **  algo **  size **  imp *** (parser reorg helps)
   
 - The \t escape sequence is the same as a literal tab, see for example  - kettenis wants base roff, ms, and me  Fri, 1 Jan 2010 22:13:15 +0100 (CET)
   the ASCII table in hexdump(1) where    loc **  exist **  algo **  size ***  imp *
     .Bl -column \&000_nu \&001_so \&002_st \&003_et \&004_eo  
     .It \&000\ nul\t001\ soh\t002\ stx\t003\ etx\t004\ eot\t005\ enq  
   produces  
     000 nul  001 soh  002 stx  003 etx  004 eot  005 enq  
   and the example in oldrdist(1)  
   
   --- compatibility checks -----------------------------------------------
   
   - is .Bk implemented correctly in modern groff?
     sobrado@  Tue, 19 Apr 2011 22:12:55 +0200
   
   - compare output to Heirloom roff, Solaris roff, and
     http://repo.or.cz/w/neatroff.git  http://litcave.rudi.ir/
   
   - look at AT&T DWB http://www2.research.att.com/sw/download
     Carsten Kunze <carsten dot kunze at arcor dot de> has patches
     Mon, 4 Aug 2014 17:01:28 +0200
   
 - look at pages generated from reStructeredText, e.g. devel/mercurial hg(1)  - look at pages generated from reStructeredText, e.g. devel/mercurial hg(1)
   These are a weird mixture of man(7) and custom autogenerated low-level    These are a weird mixture of man(7) and custom autogenerated low-level
   roff stuff.  Figure out to what extent we can cope.    roff stuff.  Figure out to what extent we can cope.
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   noted by stsp@  Sat, 24 Apr 2010 09:17:55 +0200    noted by stsp@  Sat, 24 Apr 2010 09:17:55 +0200
   reminded by nicm@  Mon, 3 May 2010 09:52:41 +0100    reminded by nicm@  Mon, 3 May 2010 09:52:41 +0100
   
   - look at pages generated from ronn(1) github.com/rtomayko/ronn
     (based on markdown)
   
   - look at pages generated from Texinfo source by yat2m, e.g. security/gnupg
     First impression is not that bad.
   
   - look at pages generated by pandoc; see
     https://github.com/jgm/pandoc/blob/master/src/Text/Pandoc/Writers/Man.hs
     porting planned by kili@  Thu, 19 Jun 2014 19:46:28 +0200
   
 - check compatibility with Plan9:  - check compatibility with Plan9:
   http://swtch.com/usr/local/plan9/tmac/tmac.an    http://swtch.com/usr/local/plan9/tmac/tmac.an
   http://swtch.com/plan9port/man/man7/man.html    http://swtch.com/plan9port/man/man7/man.html
   "Anthony J. Bentley" <anthonyjbentley@gmail.com> 28 Dec 2010 21:58:40 -0700    "Anthony J. Bentley" <anthonyjbentley@gmail.com> 28 Dec 2010 21:58:40 -0700
   
   - check compatibility with the man(7) formatter
     https://raw.githubusercontent.com/rofl0r/hardcore-utils/master/man.c
   
   - check compatibility with
     http://ikiwiki.info/plugins/contrib/mandoc/
     https://github.com/schmonz/ikiwiki/compare/mandoc
     Amitai Schlair  Mon, 19 May 2014 14:05:53 -0400
   
 ************************************************************************  ************************************************************************
 * formatting issues: ugly output  * formatting issues: ugly output
 ************************************************************************  ************************************************************************
Line 169 
Line 318 
 - a column list with blank `Ta' cells triggers a spurrious  - a column list with blank `Ta' cells triggers a spurrious
   start-with-whitespace printing of a newline    start-with-whitespace printing of a newline
   
 - double quotes inside double quotes are escaped by doubling them  
   implement this in mdoc(7), too  
   so far, we only have it in roff(7) and man(7)  
   reminded by millert@  Thu, 09 Dec 2010 17:29:52 -0500  
   
 - perl(1) SYNOPSIS looks bad; reported by deraadt@  
   1) man(7) seems to need SYNOPSIS .Nm blocks, too  
   
 - In .Bl -column,  - In .Bl -column,
   .It Em Authentication<tab>Key Length    .It Em Authentication<tab>Key Length
   ought to render "Key Length" with emphasis, too,    ought to render "Key Length" with emphasis, too,
   see OpenBSD iked.conf(5).    see OpenBSD iked.conf(5).
     reported again Nicolas Joly via wiz@ Wed, 12 Oct 2011 00:20:00 +0200
     loc *  exist ***  algo ***  size **  imp ***
   
 - empty phrases in .Bl column produce too few blanks  - empty phrases in .Bl column produce too few blanks
   try e.g. .Bl -column It Ta Ta    try e.g. .Bl -column It Ta Ta
   reported by millert Fri, 02 Apr 2010 16:13:46 -0400    reported by millert Fri, 02 Apr 2010 16:13:46 -0400
     loc *  exist ***  algo ***  size *  imp **
   
 - .%T can have trailing punctuation.  Currently, it puts the trailing  - .%T can have trailing punctuation.  Currently, it puts the trailing
   punctuation into a trailing MDOC_TEXT element inside its own scope.    punctuation into a trailing MDOC_TEXT element inside its own scope.
Line 194 
Line 338 
   slurp all arguments into one single text element - and one feature    slurp all arguments into one single text element - and one feature
   of in_line() - put trailing punctuation out of scope.    of in_line() - put trailing punctuation out of scope.
   Found in mount_nfs(8) and exports(5), search for "Appendix".    Found in mount_nfs(8) and exports(5), search for "Appendix".
     loc **  exist **  algo ***  size *  imp **
   
   - Trailing punctuation after .%T triggers EOS spacing, at least
     outside .Rs (eek!).  Simply setting ARGSFL_DELIM for .%T is not
     the right solution, it sends mandoc into an endless loop.
     reported by Nicolas Joly  Sat, 17 Nov 2012 11:49:54 +0100
     loc *  exist **  algo **  size *  imp **
   
   - global variables in the SYNOPSIS of section 3 pages
     .Vt vs .Vt/.Va vs .Ft/.Va vs .Ft/.Fa ...
     from kristaps@  Tue, 08 Jun 2010 11:13:32 +0200
   
 - in enclosures, mandoc sometimes fancies a bogus end of sentence  - in enclosures, mandoc sometimes fancies a bogus end of sentence
   reminded by jmc@  Thu, 23 Sep 2010 18:13:39 +0059    reminded by jmc@  Thu, 23 Sep 2010 18:13:39 +0059
     loc *  exist **  algo ***  size *  imp ***
   
   - formatting /usr/local/man/man1/latex2man.1 with groff and mandoc
     reveals lots of bugs both in groff and mandoc...
     reported by bentley@  Wed, 22 May 2013 23:49:30 -0600
   
   --- PDF issues ---------------------------------------------------------
   
   - PDF output doesn't use a monospaced font for .Bd -literal
     Example: "mandoc -Tpdf afterboot.8 > output.pdf && pdfviewer output.pdf".
     Search the text "Routing tables".
     Also check what PostScript mode does when fixing this.
     reported by juanfra@ Wed, 04 Jun 2014 21:44:58 +0200
     instructions from juanfra@  Wed, 11 Jun 2014 02:21:01 +0200
       add a new <</Type /Font>> block to the PDF files with /BaseFont /Courier
       and change the /Name from /F0 to the new font (/F5 (?)).
     loc *  exist **  algo **  size *  imp **
   
   --- HTML issues --------------------------------------------------------
   
   - <dl><dt><dd> formatting is ugly
     hints are easy to find on the web, e.g.
     http://stackoverflow.com/questions/1713048/
     see also matthew@  Fri, 18 Jul 2014 19:25:12 -0700
     loc *  exist *  algo **  size *  imp ***
   
   - jsg on icb, Nov 3, 2014:
     try to guess Xr in man(7) for hyperlinking
   
   - The tables used to render the three-part page headers actually force
     the width of the <body> to the max-width given for <html>.
     Not yet sure how to fix that...
     Observed by an Anonymous Coward on undeadly.org:
     http://undeadly.org/cgi?action=article&sid=20140925064244&pid=1
     loc *  exist *  algo **  size *  imp ***
   
   - consider whether <var> can be used for Ar Dv Er Ev Fa Va.
     from bentley@  Wed, 13 Aug 2014 09:17:55 -0600
   
   - check https://github.com/trentm/mdocml
   
 ************************************************************************  ************************************************************************
 * formatting issues: gratuitous differences  * formatting issues: gratuitous differences
 ************************************************************************  ************************************************************************
   
   - .Fn reopens a new scope after punctuation in mandoc,
     but closes its scope for good in groff.
     Do we want to change mandoc or groff?
     Steffen Nurpmeso  Sat, 08 Nov 2014 13:34:59 +0100
     loc *  exist **  algo **  size *  imp **
   
 - .Rv (and probably .Ex) print different text if an `Nm' has been named  - .Rv (and probably .Ex) print different text if an `Nm' has been named
   or not (run a manual without `Nm blah' to see this).  I'm not sure    or not (run a manual without `Nm blah' to see this).  I'm not sure
   that this exists in the wild, but it's still an error.    that this exists in the wild, but it's still an error.
     loc *  exist *  algo *  size *  imp * (already done?)
   
 - In .Bl -bullet, the groff bullet is "+\b+\bo\bo", the mandoc bullet  - In .Bl -bullet, the groff bullet is "+\b+\bo\bo", the mandoc bullet
   is just "o\bo".    is just "o\bo".  The problem is to not break ps/pdf when fixing.
   see for example OpenBSD ksh(1)    see for example OpenBSD ksh(1)
     loc **  exist **  algo **  size *  imp **
   
 - The characters "|" and "\*(Ba" should never be bold,  - In .Bl -enum -width 0n, groff continues one the same line after
   not even in the middle of a word, e.g. ".Cm b\*(Bac" in    the number, mandoc breaks the line.
   "mknod [-m mode] name b|c major minor"    mail to kristaps@  Mon, 20 Jul 2009 02:21:39 +0200
   in OpenBSD ksh(1)    loc *  exist **  algo **  size *  imp **
   
 - A bogus .Pp between two .It must not produce a double blank line,  
   see between -R and -r in OpenBSD rm(1), before "update" in mount(8),  
   or in DIAGNOSTICS in init(8), or before "is always true" in ksh(1).  
   The same happens with .Pp just before .El, see bgpd.conf(5).  
   Also have `It' complain if `Pp' is invoked at certain times (not  
   -compact?).  
   
 - .Pp between two .It in .Bl -column should produce one,  - .Pp between two .It in .Bl -column should produce one,
   not two blank lines, see e.g. login.conf(5).    not two blank lines, see e.g. login.conf(5).
   reported by jmc@  Sun, 17 Apr 2011 14:04:58 +0059    reported by jmc@  Sun, 17 Apr 2011 14:04:58 +0059
     reported again by sthen@  Wed, 18 Jan 2012 02:09:39 +0000 (UTC)
     loc *  exist ***  algo **  size *  imp **
   
 - If the *first* line after .It is .Pp, break the line right after  - If the *first* line after .It is .Pp, break the line right after
   the tag, do not pad with space characters before breaking.    the tag, do not pad with space characters before breaking.
   See the description of the a, c, and i commands in sed(1).    See the description of the a, c, and i commands in sed(1).
     loc *  exist **  algo **  size *  imp **
   
 - If the first line after .It is .D1, do not assert a blank line  - If the first line after .It is .D1, do not assert a blank line
   in between, see for example tmux(1).    in between, see for example tmux(1).
   reported by nicm@  13 Jan 2011 00:18:57 +0000    reported by nicm@  13 Jan 2011 00:18:57 +0000
     loc *  exist **  algo **  size *  imp **
   
   - Trailing punctuation after .It should trigger EOS spacing.
     reported by Nicolas Joly  Sat, 17 Nov 2012 11:49:54 +0100
     Probably, this should be fixed somewhere in termp_it_pre(), not sure.
     loc *  exist **  algo **  size *  imp **
   
 - .Nx 1.0a  - .Nx 1.0a
   should be "NetBSD 1.0A", not "NetBSD 1.0a",    should be "NetBSD 1.0A", not "NetBSD 1.0a",
   see OpenBSD ccdconfig(8).    see OpenBSD ccdconfig(8).
     loc *  exist *  algo *  size *  imp **
   
 - In .Bl -tag, if a tag exceeds the right margin and must be continued  - In .Bl -tag, if a tag exceeds the right margin and must be continued
   on the next line, it must be indented by -width, not width+1;    on the next line, it must be indented by -width, not width+1;
   see "rule block|pass" in OpenBSD ifconfig(8).    see "rule block|pass" in OpenBSD ifconfig(8).
     loc *  exist ***  algo **  size *  imp **
   
 - When the -width string contains macros, the macros must be rendered  - When the -width string contains macros, the macros must be rendered
   before measuring the width, for example    before measuring the width, for example
     .Bl -tag -width ".Dv message"      .Bl -tag -width ".Dv message"
   in magic(5), located in src/usr.bin/file, is the same    in magic(5), located in src/usr.bin/file, is the same
   as -width 7n, not -width 11n.    as -width 7n, not -width 11n.
     The same applies to .Bl -column column widths;
     reported again by Nicolas Joly Thu, 1 Mar 2012 13:41:26 +0100 via wiz@ 5 Mar
     reported again by Franco Fichtner Fri, 27 Sep 2013 21:02:28 +0200
     loc ***  exist ***  algo ***  size **  imp ***
     An easy partial fix would be to just skip the first word if it starts
     with a dot, including any following white space, when measuring.
     loc *  exist *  algo *  size *  imp ***
   
 - The \& zero-width character counts as output.  - The \& zero-width character counts as output.
   That is, when it is alone on a line between two .Pp,    That is, when it is alone on a line between two .Pp,
   we want three blank lines, not two as in mandoc.    we want three blank lines, not two as in mandoc.
     loc **  exist **  algo **  size *  imp **
   
 - When .Fn arguments exceed one output line, all but the first  
   should be indented, see e.g. rpc(3);  
   reported by jmc@ on discuss@  Fri, 29 Oct 2010 13:48:33 +0100  
   
 - .Ns should work when called at the end of an input line, see  
   the following code in vi(1):  
     .It Xo  
     .Op Ar line  
     .Cm a Ns Op Cm ppend Ns  
     .Op Cm !\&  
     .Xc  
     The input text is appended after the specified line.  
   
 - Header lines of excessive length:  - Header lines of excessive length:
   Port OpenBSD man_term.c rev. 1.25 to mdoc_term.c    Port OpenBSD man_term.c rev. 1.25 to mdoc_term.c
   and document it in mdoc(7) and man(7) COMPATIBILITY    and document it in mdoc(7) and man(7) COMPATIBILITY
   found while talking to Chris Bennett    found while talking to Chris Bennett
     loc *  exist *  algo *  size *  imp *
   
 - In man(7), the sequence  
     .HP  
     one line of regular text  
     .SH  
   should not produce two blank lines before the .SH,  
   see for example named-checkconf(8).  
   
 - In man(7), the sequence  
     .SH HEADER  
     <blank line>  
     .PP  
     regular text  
   should not produce any blank lines between the header and the text,  
   see for example rsync(1).  
   Reported by naddy@  Mon, 28 Mar 2011 20:45:42 +0200  
   
 - In man(7), the sequence  
     regular text  
     .IP  
     .IP "tag"  
     indented text  
   should produce one, not four blank lines between the regular text  
   and the tag, see for example rsync(1).  
   Likewise,  
     regular text  
     .IP  
     indented text  
   should produce one, not two blank lines in between, and  
     regular text  
     .IP  
     .RS  
     .IP tag  
     indented text  
   should produce one, not three blank lines.  
   Reported by naddy@  Mon, 28 Mar 2011 20:45:42 +0200  
   
 - At least sometimes, .sp is ignored right after .SH; see named.conf(5).  
   
 - trailing whitespace must be ignored even when followed by a font escape,  - trailing whitespace must be ignored even when followed by a font escape,
   see for example    see for example
     makes      makes
     \fBdig \fR      \fBdig \fR
     operate in batch mode      operate in batch mode
   in dig(1).    in dig(1).
     loc **  exist **  algo **  size *  imp **
   
 ************************************************************************  ************************************************************************
 * error reporting issues  * warning issues
 ************************************************************************  ************************************************************************
   
   - check that MANDOCERR_BADTAB is thrown in the right cases,
     i.e. when finding a literal tab character in fill mode,
     and possibly change the wording of the warning message
     to refer to fill mode, not literal mode
     See the mail from Werner LEMBERG on the groff list,
     Fri, 14 Feb 2014 18:54:42 +0100 (CET)
     loc *  exist **  algo **  size *  imp **
   
   - warn about attempts to call non-callable macros
     Steffen Nurpmeso  Tue, 11 Nov 2014 22:55:16 +0100
     Note that formatting is inconsistent in groff.
     .Fn Po prints "Po()", .Ar Sh prints "file ..." and no "Sh".
     Relatively hard because the relevant code is scattered
     all over mdoc_macro.c and all subtly different.
     loc **  exist **  algo **  size **  imp **
   
   - warn about "new sentence, new line"
     loc **  exist **  algo ***  size *  imp **
   
   - mandoc_special does not really check the escape sequence,
     but just the overall format
     loc **  exist **  algo ***  size **  imp **
   
   - integrate mdoclint into mandoc ("end-of-line whitespace" thread)
     from jmc@  Mon, 13 Jul 2009 17:12:09 +0100
     from kristaps@  Mon, 13 Jul 2009 18:34:53 +0200
     from jmc@  Mon, 13 Jul 2009 17:45:37 +0059
     from kristaps@  Mon, 13 Jul 2009 19:02:03 +0200
     (mostly done, check what remains)
   
   - -Tlint parser errors and warnings to stdout
     to tech@mdocml, naddy@  Wed, 28 Sep 2011 11:21:46 +0200
     wait!  kristaps@  Sun, 02 Oct 2011 17:12:52 +0200
   
   - for system errors, use errno/strerror/warn/err
   
 ************************************************************************  ************************************************************************
   * documentation issues
   ************************************************************************
   
   - mention hyphenation rules:
     breaking at letter-letter in text mode (not macro args)
     proper hyphenation is unimplemented
   
   - talk about spacing around delimiters
     to jmc@, kristaps@  Sat, 23 Apr 2011 17:41:27 +0200
   
   - mark macros as: page structure domain, manual domain, general text domain
     is this useful?
   
   - mention /usr/share/misc/mdoc.template in mdoc(7)?
   
   - Is all the content from http://www.std.com/obi/BSD/doc/usd/28.tbl/tbl
     covered in tbl(7)?
   
   ************************************************************************
 * performance issues  * performance issues
 ************************************************************************  ************************************************************************
   
   - Why are we using MAP_SHARED, not MAP_PRIVATE for mmap(2)?
     How does SQLITE_CONFIG_PAGECACHE actually work?  Document it!
     from kristaps@  Sat, 09 Aug 2014 13:51:36 +0200
   
 Several areas can be cleaned up to make mandoc even faster.  These are  Several areas can be cleaned up to make mandoc even faster.  These are
   
 - improve hashing mechanism for macros (quite important: performance)  - improve hashing mechanism for macros (quite important: performance)
Line 331  Several areas can be cleaned up to make mandoc even fa
Line 556  Several areas can be cleaned up to make mandoc even fa
   
 - the PDF file is HUGE: this can be reduced by using relative offsets  - the PDF file is HUGE: this can be reduced by using relative offsets
   
   - instead of re-initialising the roff predefined-strings set before each
     parse, create a read-only version the first time and copy it
     loc *  exist **  algo **  size *  imp **
   
 ************************************************************************  ************************************************************************
 * structural issues  * structural issues
 ************************************************************************  ************************************************************************
   
   - Use libz directly instead of forking gunzip(1).
     Suggested by bapt at FreeBSD among others.
   
   - We use the input line number at several places to distinguish
     same-line from different-line input.  That plainly doesn't work
     with user-defined macros, leading to random breakage.
   
 - Find better ways to prevent endless loops  - Find better ways to prevent endless loops
   in roff(7) macro and string expansion.    in roff(7) macro and string expansion.
   
Line 342  Several areas can be cleaned up to make mandoc even fa
Line 578  Several areas can be cleaned up to make mandoc even fa
   Decide which formats should be recognized where.    Decide which formats should be recognized where.
   Update both mdoc(7) and man(7) documentation.    Update both mdoc(7) and man(7) documentation.
   Triggered by  Tim van der Molen  Tue, 22 Feb 2011 20:30:45 +0100    Triggered by  Tim van der Molen  Tue, 22 Feb 2011 20:30:45 +0100
   
   - struct mparse refactoring
     Steffen Nurpmeso  Thu, 04 Sep 2014 12:50:00 +0200
   
   - Consider creating some views that will make the database more
     readable from the sqlite3 shell.  Consider using them to
     abstract from the database structure, too.
     suggested by espie@  Sat, 19 Apr 2014 14:52:57 +0200
   
   ************************************************************************
   * CGI issues
   ************************************************************************
   
    - Enable HTTP compression by detecting gzip encoding and filtering
      output through libz.
    - Sandbox (see OpenSSH).
    - Enable caching support via HTTP 304 and If-Modified-Since.
    - Allow for cgi.h to be overridden by CGI environment variables.
      Otherwise, binary distributions will inherit the compile-time
      behaviour, which is not optimal.
    - Have Mac OSX systems automatically disable -static compilation of the
      CGI: -static isn't supported.
   

Legend:
Removed from v.1.113  
changed lines
  Added in v.1.189

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