===================================================================
RCS file: /cvs/mandoc/mdoc.7,v
retrieving revision 1.249
retrieving revision 1.250
diff -u -p -r1.249 -r1.250
--- mandoc/mdoc.7	2015/01/20 19:39:34	1.249
+++ mandoc/mdoc.7	2015/01/29 00:33:57	1.250
@@ -1,4 +1,4 @@
-.\"	$Id: mdoc.7,v 1.249 2015/01/20 19:39:34 schwarze Exp $
+.\"	$Id: mdoc.7,v 1.250 2015/01/29 00:33:57 schwarze Exp $
 .\"
 .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 .\" Copyright (c) 2010, 2011, 2013 Ingo Schwarze <schwarze@openbsd.org>
@@ -15,7 +15,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: January 20 2015 $
+.Dd $Mdocdate: January 29 2015 $
 .Dt MDOC 7
 .Os
 .Sh NAME
@@ -3133,50 +3133,13 @@ Manually switching the font using the
 font escape sequences is never required.
 .Sh COMPATIBILITY
 This section provides an incomplete list of compatibility issues
-between mandoc and other troff implementations, at this time limited
-to GNU troff
+between mandoc and GNU troff
 .Pq Qq groff .
-The term
-.Qq historic groff
-refers to groff versions before 1.17,
-which featured a significant update of the
-.Pa doc.tmac
-file.
 .Pp
-Heirloom troff, the other significant troff implementation accepting
-\-mdoc, is similar to historic groff.
-.Pp
 The following problematic behaviour is found in groff:
-.ds hist (Historic groff only.)
 .Pp
 .Bl -dash -compact
 .It
-Display macros
-.Po
-.Sx \&Bd ,
-.Sx \&Dl ,
-and
-.Sx \&D1
-.Pc
-may not be nested.
-\*[hist]
-.It
-.Sx \&At
-with unknown arguments produces no output at all.
-\*[hist]
-Newer groff and mandoc print
-.Qq AT&T UNIX
-and the arguments.
-.It
-.Sx \&Bl Fl column
-does not recognise trailing punctuation characters when they immediately
-precede tabulator characters, but treats them as normal text and
-outputs a space before them.
-.It
-.Sx \&Bd Fl ragged compact
-does not start a new line.
-\*[hist]
-.It
 .Sx \&Dd
 with non-standard arguments behaves very strangely.
 When there are three arguments, they are printed verbatim.
@@ -3185,53 +3148,6 @@ but without any arguments the string
 .Dq Epoch
 is printed.
 .It
-.Sx \&Fl
-does not print a dash for an empty argument.
-\*[hist]
-.It
-.Sx \&Fn
-does not start a new line unless invoked as the line macro in the
-.Em SYNOPSIS
-section.
-\*[hist]
-.It
-.Sx \&Fo
-with
-.Pf non- Sx \&Fa
-children causes inconsistent spacing between arguments.
-In mandoc, a single space is always inserted between arguments.
-.It
-.Sx \&Ft
-in the
-.Em SYNOPSIS
-causes inconsistent vertical spacing, depending on whether a prior
-.Sx \&Fn
-has been invoked.
-See
-.Sx \&Ft
-and
-.Sx \&Fn
-for the normalised behaviour in mandoc.
-.It
-.Sx \&In
-ignores additional arguments and is not treated specially in the
-.Em SYNOPSIS .
-\*[hist]
-.It
-.Sx \&It
-sometimes requires a
-.Fl nested
-flag.
-\*[hist]
-In new groff and mandoc, any list may be nested by default and
-.Fl enum
-lists will restart the sequence only for the sub-list.
-.It
-.Sx \&Li
-followed by a delimiter is incorrectly used in some manuals
-instead of properly quoting that character, which sometimes works with
-historic groff.
-.It
 .Sx \&Lk
 only accepts a single link-name argument; the remainder is misformatted.
 .It
@@ -3245,19 +3161,6 @@ can only be called by other macros, but not at the beg
 .Sx \&%C
 is not implemented (up to and including groff-1.22.2).
 .It
-Historic groff only allows up to eight or nine arguments per macro input
-line, depending on the exact situation.
-Providing more arguments causes garbled output.
-The number of arguments on one input line is not limited with mandoc.
-.It
-Historic groff has many un-callable macros.
-Most of these (excluding some block-level macros) are callable
-in new groff and mandoc.
-.It
-.Sq \(ba
-(vertical bar) is not fully supported as a delimiter.
-\*[hist]
-.It
 .Sq \ef
 .Pq font face
 and
@@ -3275,12 +3178,26 @@ The following features are unimplemented in mandoc:
 .Bl -dash -compact
 .It
 .Sx \&Bd
-.Fl file Ar file .
+.Fl file Ar file
+is unsupported for security reasons.
 .It
 .Sx \&Bd
+.Fl filled
+does not adjust the right margin, but is an alias for
+.Sx \&Bd
+.Fl ragged .
+.It
+.Sx \&Bd
+.Fl literal
+does not use a literal font, but is an alias for
+.Sx \&Bd
+.Fl unfilled .
+.It
+.Sx \&Bd
 .Fl offset Cm center
 and
-.Fl offset Cm right .
+.Fl offset Cm right
+don't work.
 Groff does not implement centered and flush-right rendering either,
 but produces large indentations.
 .El