resolve inconsistent-return-statements lint error.

dbieber · copybara-github · commit ed3cd74b4d24 · 2019-07-24T14:50:36.000-07:00
PiperOrigin-RevId: 259821764
Change-Id: I3983037f00f0d620b84363cd1bfc348c085ac8a2
diff --git a/fire/helptext.py b/fire/helptext.py
@@ -417,6 +417,7 @@ def _GetArgDescription(name, docstring_info):
     for arg_in_docstring in docstring_info.args:
       if arg_in_docstring.name in (name, '*' + name, '**' + name):
         return arg_in_docstring.description
+  return None
 
 
 def _GroupUsageDetailsSection(groups):
