When ndiff gets a command-line option it doesn't understand, print just the

exception message rather than the whole exception tuple. This changes
./ndiff: ('option --foo not recognized', 'foo')
to
./ndiff: option --foo not recognized

ndiff/ndiff

@@ -689,7 +689,7 @@ def main():
     try:
         opts, input_filenames = getopt.gnu_getopt(sys.argv[1:], "hv", ["help", "text", "verbose", "xml"])
     except getopt.GetoptError, e:
-        print >> sys.stderr, u"%s: %s" % (sys.argv[0], unicode(e))
+        print >> sys.stderr, u"%s: %s" % (sys.argv[0], e.msg)
         sys.exit(1)
     for o, a in opts:
         if o == "-h" or o == "--help":