[PATCH] Add commit message guidelines to developer policy

[Richard Smith]

================
Comment at: docs/DeveloperPolicy.rst:320-322
@@ +319,5 @@
+* `Attribution of Changes`_ should be in a separate line, after the end of
+  the body, as simple as "Patch by John Doe.". This is how we officially
+  handle attribution, and there are automated processes that rely on this
+  format.
+
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If we want to officially support such processes, we should be very explicit as to exactly what format they're looking for. Presumably, it's a case-insensitive match for the string "patch by "?

http://reviews.llvm.org/D8197

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