pydata/pandas — pull request #6988 by immerrr (2014-04-28 09:24:28+00:00)
Title: CLN: drop internals._invert_reordering in favour of lib.get_reverse_indexer

I've implemented the former while refactoring BlockManager (#6745) because I didn't find the latter in lib module. This PR will remove the duplication (and also add missing changelog entry).