Update api.py

`words` is a list containing separated words. Thus, it should not be passed into `is_url()` as a string.

Author: h1994st

twitter/api.py

@@ -1435,7 +1435,7 @@ def _TweetTextWrap(self,
         line_length = 0
         words = re.split(r'\s', status)
 
-        if len(words) == 1 and not is_url(words):
+        if len(words) == 1 and not is_url(words[0]):
             if len(words[0]) > 140:
                 raise TwitterError({"message": "Unable to split status into tweetable parts. Word was: {0}/{1}".format(len(words[0]), char_lim)})
             else: