diff -up graphviz-2.30.1/contrib/prune/prune.c.orig10 graphviz-2.30.1/contrib/prune/prune.c
--- graphviz-2.30.1/contrib/prune/prune.c.orig10	2013-02-14 14:27:39.000000000 +0100
+++ graphviz-2.30.1/contrib/prune/prune.c	2013-07-12 13:35:44.315004975 +0200
@@ -128,7 +128,11 @@ int main(int argc, char **argv)
 		break;
 	    }
 	case '?':
-	    if (isprint(optopt)) {
+	    if (optopt == '?')
+	    {
+		help_message(progname);
+		exit(EXIT_SUCCESS);
+	    } else if (isprint(optopt)) {
 		fprintf(stderr, "Unknown option `-%c'.\n", optopt);
 	    } else {
 		fprintf(stderr, "Unknown option character `\\x%X'.\n",
diff -up graphviz-2.30.1/contrib/prune/prune.1.orig10 graphviz-2.30.1/contrib/prune/prune.1
--- graphviz-2.30.1/contrib/prune/prune.1.orig10	2013-02-14 14:27:39.000000000 +0100
+++ graphviz-2.30.1/contrib/prune/prune.1	2013-07-12 13:45:30.544918729 +0200
@@ -20,6 +20,12 @@ prune \- Prune directed graphs
 .BI \-N " attrspec"
 ]
 [
+.B \-v
+]
+[
+.BR \- ( h | ? )
+]
+[
 .I files ...
 ]
 .SH DESCRIPTION
@@ -54,6 +60,12 @@ pruned node.
 .I attrspec
 is a string of the form
 .IR attr "=" value.
+.TP
+.B \-v
+Verbose output.
+.TP
+.BR \-h " "\-?
+Prints the usage and exits.
 
 .SH EXAMPLES
 An input graph