pathencode: fix hashmangle short dir limit (issue3958) The Python version of this (see mercurial/store.py:_hashencode) copies path components up to a limit of maxshortdirslen bytes. The Python version does not consider the initial "dh/" to be part of the this, though, while the C version currently does. Adding len("dh/") == 3 to the limit for the C version brings it in line with the Python version. This was not caught by the randomized testing scheme in test-pathencode.py because of a couple of flaws with the test. Upcoming patches will fix those problems.

docs: change description to synopsis in hgrc.5 Spotted by Eric S. Raymond.

run-tests: sort missing files first instead of raising an error sort first for early telling typos in test names

filectx: remove dependencies on filerev Removing dependencies on filectx.filerev() makes it easier to create a filelog implementation that doesn't have rev numbers.

hg: move return statement after finally block return is always run after finally block. Now we have same functionality, but clearer readability.

run-tests: call Threads constructor with keyword arguments This is suggested in the python documentation (on http://docs.python.org/2/library/threading.html#thread-objects)