Add note to man page how lefty (dotty/lneato) relies on xdot.

diff --git a/cmd/dotty/dotty.1 b/cmd/dotty/dotty.1
index 996e6614849e7ed9b2ee3c39eec9be8c2a55a418..6221316e12ac2d2abf6995e3489fa69cad494eb8 100644 (file)
--- a/cmd/dotty/dotty.1
+++ b/cmd/dotty/dotty.1
@@ -33,6 +33,12 @@ made by
 which runs as a separate process that communicates with
 .B lefty
 through pipes.
+
+If the input graph contains xdot attributes,
+.B dotty
+will use that to display the graph. Otherwise, it runs
+.B dot
+to obtain layout information.
 .SH USAGE
 The file name is optional. If present, the graph contained in that file is
 displayed in the
@@ -42,8 +48,10 @@ window.
 .TP
 .B -V
 Prints the version.
+.SH BUGS
+The lefty parser does not accept anonymous graphs.
 .SH SEE ALSO
-dot(1), lefty(1)
+dot(1), lefty(1), lneato(1), xdot(3)
 .br
 .I dotty
 user guide.

diff --git a/cmd/lneato/lneato.1 b/cmd/lneato/lneato.1
index 95ab6445da1979c05b35ee3747892d2992abe7de..6a1a57d8cf6f1204ff8c28da3b7f847974c4454f 100644 (file)
--- a/cmd/lneato/lneato.1
+++ b/cmd/lneato/lneato.1
@@ -33,6 +33,12 @@ made by
 which runs as a separate process that communicates with
 .B lefty
 through pipes.
+
+If the input graph contains xdot attributes,
+.B lneato
+will use that to display the graph. Otherwise, it runs
+.B neato
+to obtain layout information.
 .SH USAGE
 The file name is optional. If present, the graph contained in that file is
 displayed in the
@@ -43,7 +49,7 @@ window.
 .B -V
 Prints the version.
 .SH SEE ALSO
-neato(1), lefty(1), dotty(1),
+neato(1), lefty(1), dotty(1), xdot(3),
 .br
 .I dotty
 user guide.