largefiles: remove useless overrideupdate Now, "overrideupdate()" wrapping "hg update" is useless, because "workingctx.dirty() and raising Abort" in "hg update" was replaced by "cmdutil.bailifchanged()" in the previous patch, and the latter can detect changes of largefiles in the working directory.

update: replace workingctx.dirty and raising Abort by cmdutil.bailifchanged This patch makes wrapping "commands.update()" by largefiles extension useless, because "cmdutil.bailifchanged()" can detect changes of largefiles in the working directory. This patch also changes test-update-branches.t, because "cmdutil.bailifchanged()" shows more detailed information about dirty-ness of the working directory than "workingctx.dirty()".

cmdutil: allow bailifchanged to ignore merging in progress In "commands.update()", "cmdutil.bailifchanged()" isn't used for "abort if the working directory is dirty", because it forcibly examines about merging in progress. "workingctx.dirty()" used in "commands.update()" can't detect changes of largefiles in the working directory without "repo.lfstatus = True" wrapping. This is only reason of "commands.update()" wrapping by largefiles extension. On the other hand, "cmdutil.bailifchanged()" already wrapped by largefiles extension can detect changes of largefiles. This patch is a preparations for replacing "workingctx.dirty()" and raising Abort in "commands.update()" by "cmdutil.bailifchanged()". It can remove redundant "commands.update()" wrapping.

subrepo: add bailifchanged to centralize raising Abort if subrepo is dirty This patch also centralizes composing dirty reason message like "uncommitted changes in subrepository 'xxxx'".

subrepo: add dirtyreason to centralize composing dirty reason message This patch newly adds "dirtyreason()" to centralize composing dirty reason message like "uncommitted changes in subrepository 'xxxx'". There are 3 similar messages below, and this patch is a part of preparations for unifying them into (1), too. 1. uncommitted changes in subrepository 'XXXX' 2. uncommitted changes in subrepository XXXX 3. uncommitted changes in subrepo XXXX This patch chooses adding new method "dirtyreason()" instead of making "dirty()" return "reason string", because: - some of existing "dirty()" implementation is too complicated to do so simply, and - ill-mannered 3rd party subrepo classes, of which "dirty()" doesn't return "reason string", cause meaningless message (even though it is rare case)

record_curses: add test for newly added files We have a UI bug where toggling a newly added file twice in the curses interface didn't mark it as selected. This test checks that the underlying logic is working as expected, the next patch of the series fixes the UI bug.