This is the first commit in a series that will reformat all the python files in the LLVM repository. Reformatting is done with `black`. See more information here: https://discourse.llvm.org/t/rfc-document-and-standardize-python-code-style Reviewed By: jhenderson, JDevlieghere, MatzeB Differential Revision: https://reviews.llvm.org/D150545
Differential Revision: https://reviews.llvm.org/D135532
Right now it just catches arcanist noisy tags, and include a script to automatically clean these. Follow up on http://lists.llvm.org/pipermail/llvm-dev/2019-December/137848.html Differential Revision: https://reviews.llvm.org/D80978