fix formatting

Change-Id: I1ec7deeeadeeac3dacca58a9d4207c23551e5dd9

Author: zzzeek

doc/build/unreleased/disable_unicode.rst

@@ -1,4 +1,4 @@
 .. change::
     :tags: py3k
 
-    Removed ``disable_unicode`` flag, that's no longer used in Python 3.
+     Removed ``disable_unicode`` flag, that's no longer used in Python 3.