Update tred man page to reflect added flag.

diff --git a/cmd/tools/tred.1 b/cmd/tools/tred.1
index e15c3c1f466d9b251f9f8d882760d9bd62f337f1..eb52b0decf56c08ba3f30e759638388e03b22146 100644 (file)
--- a/cmd/tools/tred.1
+++ b/cmd/tools/tred.1
@@ -3,6 +3,9 @@
 tred \- transitive reduction filter for directed graphs
 .SH SYNOPSIS
 .B tred
+[
+.B \-v?
+]
 [ 
 .I files 
 ]
@@ -20,6 +23,14 @@ is particularly useful as a preprocessor to
 to reduce clutter in dense layouts.
 .PP
 Undirected graphs are silently ignored.
+.SH OPTIONS
+The following options are supported:
+.TP
+.B \-v
+Verbose output.
+.TP
+.B \-?
+Print usage information.
 .SH OPERANDS
 The following operand is supported:
 .TP 8