===================================================================
RCS file: /cvs/mandoc/mandoc.1,v
retrieving revision 1.156
retrieving revision 1.163
diff -u -p -r1.156 -r1.163
--- mandoc/mandoc.1	2015/03/27 16:36:31	1.156
+++ mandoc/mandoc.1	2015/10/30 19:04:16	1.163
@@ -1,4 +1,4 @@
-.\"	$Id: mandoc.1,v 1.156 2015/03/27 16:36:31 schwarze Exp $
+.\"	$Id: mandoc.1,v 1.163 2015/10/30 19:04:16 schwarze Exp $
 .\"
 .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 .\" Copyright (c) 2012, 2014, 2015 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: March 27 2015 $
+.Dd $Mdocdate: October 30 2015 $
 .Dt MANDOC 1
 .Os
 .Sh NAME
@@ -284,6 +284,8 @@ See
 .Sx PostScript Output .
 .It Fl T Cm tree
 Produce an indented parse tree.
+See
+.Sx Syntax tree output .
 .It Fl T Cm utf8
 Encode output in the UTF\-8 multi-byte format.
 See
@@ -490,6 +492,45 @@ to force a UTF\-8 locale.
 See
 .Sx Locale Output
 for details and options.
+.Ss Syntax tree output
+Use
+.Fl T Cm tree
+to show a human readable representation of the syntax tree.
+It is useful for debugging the source code of manual pages.
+The exact format is subject to change, so don't write parsers for it.
+Each output line shows one syntax tree node.
+Child nodes are indented with respect to their parent node.
+The columns are:
+.Pp
+.Bl -enum -compact
+.It
+For macro nodes, the macro name; for text and
+.Xr tbl 7
+nodes, the content.
+There is a special format for
+.Xr eqn 7
+nodes.
+.It
+Node type (text, elem, block, head, body, body-end, tail, tbl, eqn).
+.It
+Flags:
+.Bl -dash -compact
+.It
+An opening parenthesis if the node is an opening delimiter.
+.It
+An asterisk if the node starts a new input line.
+.It
+The input line number (starting at one).
+.It
+A colon.
+.It
+The input column number (starting at one).
+.It
+A closing parenthesis if the node is a closing delimiter.
+.It
+A full stop if the node ends a sentence.
+.El
+.El
 .Sh ENVIRONMENT
 .Bl -tag -width MANPAGER
 .It Ev MANPAGER
@@ -502,7 +543,8 @@ Specifies the pagination program to use when
 .Ev MANPAGER
 is not defined.
 If neither PAGER nor MANPAGER is defined,
-.Pa /usr/bin/more Fl s
+.Xr more 1
+.Fl s
 will be used.
 .El
 .Sh EXIT STATUS
@@ -566,7 +608,7 @@ as the style-sheet:
 .Pp
 To check over a large set of manuals:
 .Pp
-.Dl $ mandoc \-T lint `find /usr/src -name \e*\e.[1-9]`
+.Dl $ mandoc \-T lint \(gafind /usr/src -name \e*\e.[1-9]\(ga
 .Pp
 To produce a series of PostScript manuals for A4 paper:
 .Pp
@@ -813,7 +855,7 @@ In the SEE ALSO section, an
 macro with a lower section number follows one with a higher number,
 or two
 .Ic \&Xr
-macros refering to the same section are out of alphabetical order.
+macros referring to the same section are out of alphabetical order.
 .It Sy "unusual Xr punctuation"
 .Pq mdoc
 In the SEE ALSO section, punctuation between two
@@ -933,13 +975,6 @@ list block contains text or macros before the first
 .Ic \&It
 macro.
 The offending children are moved before the beginning of the list.
-.It Sy ".Vt block has child macro"
-.Pq mdoc
-The
-.Ic \&Vt
-macro supports plain text arguments only.
-Formatting may be ugly and semantic searching
-for the affected content might not work.
 .It Sy "fill mode already enabled, skipping"
 .Pq man
 A
@@ -1565,6 +1600,13 @@ By requesting the inclusion of a sensitive file, a mal
 might otherwise trick a privileged user into inadvertently displaying
 the file on the screen, revealing the file content to bystanders.
 The argument is ignored including the file name following it.
+.It Sy "skipping display without arguments"
+.Pq mdoc
+A
+.Ic \&Bd
+block macro does not have any arguments.
+The block is discarded, and the block content is displayed in
+whatever mode was active before the block.
 .It Sy "missing list type, using -item"
 .Pq mdoc
 A