autohelp: fix poor behavior of _sanitize_default

Change-Id: I9a9d41785c7674056a6d553941510ca1e5b30383

autogenerate_config_docs/autohelp.py

@@ -203,7 +203,7 @@ def _sanitize_default(opt):
         return '"%s"' % default
 
     for pathelm in sys.path:
-        if pathelm == '':
+        if pathelm in ('.', ''):
             continue
         if pathelm.endswith('/'):
             pathelm = pathelm[:-1]