Have demandoc throw away deroff's flags.

1 files changed, 29 insertions, 2 deletions

diff --git a/demandoc.1 b/demandoc.1
index 23463af1..0b909514 100644
--- a/demandoc.1
+++ b/demandoc.1
@@ -22,11 +22,12 @@
 .Nd emit only text of UNIX manuals
 .Sh SYNOPSIS
 .Nm demandoc
+.Op Fl w
 .Op Ar
 .Sh DESCRIPTION
 The
 .Nm
-utility emits only the text portions of
+utility emits only the text portions of well-formed
 .Xr mdoc 7
 and
 .Xr man 7
@@ -34,6 +35,13 @@ and
 manual files.
 Its arguments are as follows:
 .Bl -tag -width Ds
+.It Fl w
+Output a word list.
+This outputs each word of text on its own line.
+A
+.Qq word
+starts with at least two letters and consists of at least three letters
+total.
 .It Ar
 The input files.
 .El
@@ -44,8 +52,20 @@ is not provided,
 .Nm
 accepts standard input.
 .Pp
+By default,
 .Nm
-output preserves the line numbering and column position of its input.
+parses its input and outputs only text nodes, preserving line column
+position.
+If a document is not well-formed, it is skipped.
+.Pp
+The
+.Fl i ,
+.Fl k ,
+.Fl m ,
+and
+.Fl p
+flags are silently discarded for calling compatibility with the
+historical deroff.
 .Sh EXIT STATUS
 The
 .Nm
@@ -66,6 +86,13 @@ The output databases are corrupt and should be removed .
 .Xr mandoc 1 ,
 .Xr man 7
 .Xr mdoc 7
+.Sh HISTORY
+.Nm
+replaces the historical deroff utility for handling modern
+.Xr man 7
+and
+.Xr mdoc 7
+documents.
 .Sh AUTHORS
 The
 .Nm