===================================================================
RCS file: /cvs/mandoc/Attic/mdoctree.1,v
retrieving revision 1.5
retrieving revision 1.6
diff -u -p -r1.5 -r1.6
--- mandoc/Attic/mdoctree.1	2009/03/08 18:02:36	1.5
+++ mandoc/Attic/mdoctree.1	2009/03/09 13:04:01	1.6
@@ -1,4 +1,4 @@
-.\" $Id: mdoctree.1,v 1.5 2009/03/08 18:02:36 kristaps Exp $
+.\" $Id: mdoctree.1,v 1.6 2009/03/09 13:04:01 kristaps Exp $
 .\"
 .\" Copyright (c) 2009 Kristaps Dzonsons <kristaps@kth.se>
 .\"
@@ -16,7 +16,7 @@
 .\" TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 .\" PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: March 8 2009 $
+.Dd $Mdocdate: March 9 2009 $
 .Dt mdoctree 1
 .Os
 .\" SECTION
@@ -103,6 +103,8 @@ When rewinding the scope of a block macro, forces the 
 scope violations.  This can seriously mangle the resulting tree.
 .It Fl f Ns Ar ign-escape
 Ignore invalid escape sequences.
+.It Fl f Ns Ar ign-macro
+Ignore unknown macros at the start of input lines.
 .El
 .\" PARAGRAPH
 .Pp
@@ -113,6 +115,27 @@ flag, multiple
 options may be grouped and delimited with a comma.  Using
 .Fl f Ns Ar ign-scope,ign-escape ,
 for example, will try to ignore scope and character-escape errors.
+.\" SUB-SECTION
+.Ss Input Encoding
+The
+.Nm
+utility expects its input to be 7-bit ASCII as defined in
+.Xr ascii 7 .
+The only non-graphing characters accepted are spaces,
+.Sq \  ,
+and tabs,
+.Sq \et .
+Tabs are only accepted in literal block-displays and as column
+delimiters.
+.Pp
+Only Unix-style newlines (\en) are accepted; if the newline is escaped,
+the line is concatenated with the next.
+.\" SUB-SECTION
+.Ss Character Escapes
+Since
+.Nm
+doesn't format its output, character escapes are displayed as passed
+into the compiler. 
 .\" SECTION
 .Sh EXAMPLES
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