Allow user to specify root graph name in gvpack

diff --git a/cmd/tools/gvpack.1 b/cmd/tools/gvpack.1
index 1e0cab8decab81941f6b3e0aed05b0083f490002..e40785ecff6972c36cdcbfb8a35c2e3c55970443 100644 (file)
--- a/cmd/tools/gvpack.1
+++ b/cmd/tools/gvpack.1
@@ -16,6 +16,9 @@ gvpack \- merge and pack disjoint graphs
 .BI \-o outfile
 ]
 [
+.BI \-s graph_name
+]
+[
 .BI \-G name\fB=\fPvalue
 ]
 [ 
@@ -74,6 +77,10 @@ Combines the graphs at the node level. Clusters are ignored in the packing.
 Prints output to the file \fIoutput\fP. If not given, \fBgvpack\fP
 uses stdout.
 .TP
+.BI \-s "graph_name"
+Use \fIgraph_name\fP as the name of the root graph. By default, "root"
+is used.
+.TP
 .B \-u
 Don't pack the graphs. Just combine them into a single graph.
 .TP