tests: add basic commandserver test

color: for the sake of "less -R", default to ansi in auto mode (issue2792) less with the -R option only supports ANSI color codes, and terminfo mode issue non-ANSI color codes (depending on the database). The -r option can work around this, but there are users currently using the -R option, and defaulting to terminfo would break colorization in less for them without warning.

color: fix TypeError with auto mode on win32 when colors aren't available (issue2871) This can happen when stdout isn't a terminal (e.g., it's being piped).

test-revert: add revert --all case when nothing changed supposed to succeed without notice

subrepos: be smarter about what's an absolute path (issue2808)

test-wireprotocol.py: rename to test-wireproto.py for consistency 1. The module named 'wireproto' is tested. 2. There already is a test-wireproto.t for related tests on shell level.

classes: fix class style problems found by b071cd58af50 This makes test-wireprotocol.py work on Python 2.4

check-code: fix class style checking (with tests) - old-style classes were only checked for one-letter class names - add check for new-style classes with empty parent class, because this is not available in Python 2.4

tests: ignore inotify extension in test-duplicateoptions.py The inotify extension is only available on linux and setup.py will not install it on other platforms - but it will of course always be there in the source. test-duplicateoptions.py tried to load most extensions (including inotify if available). When the local uninstalled Mercurial was used it would thus always load the inotify extension and cause a warning on unsupported platforms. The inotify extension is not relevant for this test, so now we explicitly ignore it.

error: Add a hint argument to RepoError This use the same mechanism than Abort. Except clause stay distinct because RepoError add "!" at the end of the message.