phases: avoid a potentially costly dictionary interation in some case If we retract for the draft phase, there is not non-public item to be retracted and we can skip this part. This part is was apparently super costly thanks to Python. On mozilla-try-2019-02-18, a perf::unbundle call with a 10 000 changesets bundle gives give use the following timing. e57d4b868a3e: 4.6 seconds ac1c75188440: 102.5 seconds this-changeset: 30.0 seconds So we recovered about ⅔ of the regression, the next changeset will give us the rest back.

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Mercurial's documentation is kept in reStructuredText format, which is

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a simple plain text format that's easy to read and edit:

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  http://docutils.sourceforge.net/rst.html

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It's also convertible to a variety of other formats including standard

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UNIX man page format and HTML. You'll need to install Docutils:

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  http://docutils.sourceforge.net/

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Use the Makefile in this directory to generate the man and HTML pages.