Put whitespace before http to prevent colorizing issues

Sometimes hashtags will be smashed into links. When the _print_stream_item regex tried to put in
the colorings, the escape codes were being inserted after the : in the link. This commit will put
a space before http (if there's a charcter in front of it).

Author: nloadholtes

krill/krill.py

@@ -207,7 +207,7 @@ def _print_stream_item(self, item, pattern=None):
             excerpt, clipped_left, clipped_right = excerpter.get_excerpt(item.text, 220, pattern)
 
             # Put a space before http to separate things better
-            excerpt = re.sub(r"\whttp", r" http", excerpt.replace("hhttp", "h http"))
+            excerpt = re.sub(r"(\S){1}http", r"\1 http", excerpt)
 
             # Hashtag or mention
             excerpt = re.sub("(?<!\w)([#@])(\w+)",