tests: show added/modified/removed files when logging repos converted from bzr There's a bug related to incorrect status values that can be triggered by an octopus fixup merge. Seeing what the current status is (instead of just the aggregate list) will hopefully help track this down.

tests: drop an unnecessary redirect to /dev/null This eliminates the need to conditionalize the color output, because NUL on Windows is a tty. Credit to Yuya for recognizing this.

py3: whitelist another test caught by the ratchet Differential Revision: https://phab.mercurial-scm.org/D4335

index: move raise_revlog_error() further up I will add another caller below it. Differential Revision: https://phab.mercurial-scm.org/D4119

index: make node tree a Python object Differential Revision: https://phab.mercurial-scm.org/D4118

index: rename _fix_index() since it no longer fixes the index Since c0d411ea6639 (index: drop support for negative indexes into the index, 2018-07-20), it always returns the input (unless it raises). Differential Revision: https://phab.mercurial-scm.org/D4334