fix bug when no help text given for option - wrap returns empty list

2012-04-27 04:16:28 -07:00 · 2012-04-27 04:16:28 -07:00 · dd3ff7f89b
parent e4e85da3a6
commit dd3ff7f89b
1 changed files with 1 additions and 1 deletions
--- a/tornado/options.py
+++ b/tornado/options.py
@ -184,7 +184,7 @@ def print_help(file=sys.stdout):
            if option.default is not None and option.default != '':
                description += " (default %s)" % option.default
            lines = textwrap.wrap(description, 79 - 35)
-            if len(prefix) > 30:
+            if len(prefix) > 30 or len(lines) == 0:
                lines.insert(0, '')
            print >> file, "  --%-30s %s" % (prefix, lines[0])
            for line in lines[1:]: