Fix PEP8 issue.

lib/ansible/modules/files/lineinfile.py

@@ -45,7 +45,7 @@ options:
       - The regular expression to look for in every line of the file.
       - For C(state=present), the pattern to replace if found. Only the last line found will be replaced.
       - For C(state=absent), the pattern of the line(s) to remove.
-      - If the regular expression is not matched, the line will be 
+      - If the regular expression is not matched, the line will be
         added to the file in keeping with`insertbefore` or `insertafter`
         settings.
       - Uses Python regular expressions. See U(http://docs.python.org/2/library/re.html).