revset: make repo.anyrevs accept customized alias override (API) Previously repo.anyrevs only expand aliases in [revsetalias] config. This patch makes it more flexible to accept a customized dict defining aliases without having to couple with ui. revsetlang.expandaliases now has the signature (tree, aliases, warn=None) which is more consistent with templater.expandaliases. revsetlang.py is now free from "ui", which seems to be a good thing.

tests: quote $PYTHON for Windows When unquoted, MSYS sees the colon between the drive letter and path as a Unix path separator and unhelpfully splits on it, feeding only the drive letter as the command. Much chaos ensues. I vaguely remember trying to get the test runner to use /letter/path/to/exe syntax the last time this happened, without success. I doubt a check-code rule would work, since sometimes it is quoted, and sometimes the quotes are escaped.

amend: use scmutil.cleanupnodes (BC) This is marked as BC because the strip backup file name has changed.

rebase: remove "if True" The "if True" block was to make the last patch easier to review. This patch removes "if True" and unindents the block.