From e6b0b86eb2101a6db945febb25c20bc895a76d4d Mon Sep 17 00:00:00 2001
From: fnord <fnord@fnord.mobi>
Date: Wed, 15 Jul 2015 05:59:33 -0500
Subject: [PATCH] explain purpose of text_or_none

---
 youtube_dl/utils.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index 485408baa..5a9c1ea3a 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -1852,6 +1852,7 @@ def dfxp2srt(dfxp_data):
 
 
     def text_or_empty(v):
+        """ return string that contains something other than whitespace, or '' """
         str = str_or_none(v, '')
         return '' if not re.search(r'[^\s]',str,re.DOTALL) else str