changegroup.group: drop 'reorder' parameter Since we always pass self._reorder to self.group(), let's drop the parameter and let group() read from self._reorder itself. There are no other in-tree callers to group().

cg2packer: set reorder=False in __init__ instead of in group() The difference between reorder=None (bundle.reorder=auto) and reorder=False is that the generaldelta revlogs get reordered with the former. In cg2packer, group() we check if the revlog uses generaldelta and if reorder=None and then convert that to reorder=False. We are effectively saying that whether or not generaldelta is used, we want reorder=None to mean reorder=False for changegroup 2. To make this clearer, check if reorder=None in the constructor and change it to False there and drop the overriding of group(). Also document the reason for turning reordering off.

changegroup: use 'reorder is None' instead of 'reorder is not True/False' The config option bundle.reorder can be {on,off,auto}, which gets read into the 'reorder' variable as {True,False,None}. In two places, we need to decide how to handle the None/auto case. I personally find it easier to read those expressions when written to explicitly compare to None.

crecord: fix mixed imports warning

windows: add doctest for shellquote() This is actual test coverage for issue4629. The test changes in eea3977e6fca were simply the addition of quotes to the output, not ensuring that strings with backslashes are quoted.

template-phases: extend default style instead of duplicating it The phases style started as a copy of the default style at 5c5152af0d15, but we didn't have to copy it because the templater supports %include syntax. This makes sure that the phases style have the same output as the default except for the additional "phase:" row.

commands: hide formatter option as EXPERIMENTAL, not as DEPRECATED 117b9a101f71 introduced the EXPERIMENTAL marker, so we should use it consistently.