log: prevent negative date range from displaying entire log (issue1805)

manifest/revlog: do not let the revlog cache mutable objects If a buffer of an mutable object is passed to revlog.addrevision(), the revlog will happily store it in its cache. Later when the revlog reuses the cached entry, if the manifest modified the object in-between, all kind of bugs appears. We fix it by: - passing immutable objects to addrevision() if they are already available - only storing the text in the cache if it's of str type Then we can remove the conversion of the cache entry to str() during retrieval. That was probably just there hiding the bug for the common cases but not really fixing it.

doc/README: simplify instructions

doc: use our own rst2man.py script (issue1746) The rst2man tool has not yet been part of an official Docutils release, and it is not present in most distributions. This poses a problem for people who want to install Mercurial from source, or who want to create a Mercurial package for such a distribution -- how to specify the build-dependencies? By including the rst2man.py script with Mercurial people only need a normal Docutils installation in order to install Mercurial.

util, minirst: do not crash with COLUMNS=0

manifestdict: remove unnecessary dictionary copy No need to copy the dict, dict.__init__() will do that for us. It was responsible for a non-negligeable waste of time during a qpush of an -mm queue on the kernel repo.

manifest.add(): cleanup worklist construction and iteration

manifest: simplify cache handling, use a unique cache

manifest.add(): simplify with iterators and generator expressions

color: do all setup in uisetup Now that extensions are loaded in phases, we are guaranteed to always find mq in uisetup with extensions.find and we know that the mq commands are not yet copied into commands.table.