mq: remove undo after a qimport

transaction: use posixfile and unlink from util instead of open() and os.unlink() Avoids potential issues with file access on Windows (e.g. AV-scanners).

bookmarks: update help text since moving into core Clarifies the help text for the bookmarks command regarding the requirements for pushing or pulling bookmarks.

debugignore: catch the case when ignore.includepat doesn't exist In testing of my recent addition of a debugignore command, some of my MacHg users uncovered the exceptional case that if there is no ignore patterns of any kind then a traceback occurred. Catch and fix this case.

tests: use printenv.py where it is - don't copy it around

tests: let printenv.py show the real values Test paths are now hidden by the test framework, so HG_URL no longer needs mangling.

hgweb: make paths wildcards expanding in a repo root match repo correctly There was a trailing '/' too much when the wildcard part expanded to nothing. The consequence was that the repo was announced but didn't work.

hgweb: doctest of url creation from wildcard expansion

bookmarks: fix up test-https

explicitly close files Add missing calls to close() to many places where files are opened. Relying on reference counting to catch them soon-ish is not portable and fails in environments with a proper GC, such as PyPy.