Enforce splitting before bitwise operator

If the style wants to split before the bitwise operator and a split exists in
the original code, then we assume that the programmer wanted it formatted like
that and enforce the split in the reformatted code.
diff --git a/CHANGELOG b/CHANGELOG
index 0523fce..93645a9 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -5,6 +5,9 @@
 ## [0.7.2] UNRELEASED
 ### Fixed
 - There shouldn't be a space between a decorator and an intervening comment.
+- If we split before a bitwise operator, then we assume that the programmer
+  knows what they're doing, more or less, and so we enforce a split before said
+  operator if one exists in the original program.
 
 ## [0.7.1] 2016-04-21
 ### Fixed