merge: do not warn about copy and rename in the same transaction (issue2113)

merge with stable

revpair: handle odd ranges (issue3474)

match: make 'match.files()' return list object always 'exact' match objects are sometimes created with a non-list 'pattern' argument: - using 'set' in queue.refresh():hgext/mq.py match = scmutil.matchfiles(repo, set(c[0] + c[1] + c[2] + inclsubs)) - using 'dict' in revert():mercurial/cmdutil.py (names = {}) m = scmutil.matchfiles(repo, names) 'exact' match objects return specified 'pattern' to callers of 'match.files()' as it is, so it is a non-list object. but almost all implementations expect 'match.files()' to return a list object, so this may causes problems: e.g. exception for "+" with another list object. this patch ensures that '_files' of 'exact' match objects is a list object. for non 'exact' match objects, parsing specified 'pattern' already ensures that it it a list one.

perf: add a perfdirstatewrite benchmark

parsers: cache the result of index_headrevs Although index_headrevs is much faster than its Python counterpart, it's still somewhat expensive when history is large. Since headrevs is called several times when the tag cache is stale or missing (e.g. after a strip or rebase), there's a win to be gained from caching the result, which we do here.

revlog: switch to a C version of headrevs The C implementation is more than 100 times faster than the Python version (which is still available as a fallback). In a repo with 330,000 revs and a stale .hg/cache/tags file, this patch improves the performance of "hg tip" from 2.2 to 1.6 seconds.

perf: rework perfheads and perftags to clear caches The cache clearing makes numbers more reproducible.

parsers: reduce raw_length when truncating When stripping revs, we now update raw_length to correctly reflect the new end of the index.

help: inline helper function used once only