pypy: fix doctests for pypy optimizations PyPy would sometime call __len__ at points where it things preallocating the container makes sense. Change the doctests so they're using generator expressions and not list comprehensions

largefiles: replace invocation of os.path module by vfs in reposetup.py This commit is part of bigger effort described in 'Windows UTF-8' plan.

largefiles: replace invocation of os.path module by vfs in overrides.py This commit is part of bigger effort described in 'Windows UTF-8' plan. It is not changing all invocations but the ones where change is obviously correct and doesn't require complicated changes.

bundle: warn when update to revision existing only in a bundle (issue5004) Now its done silently, so unless user really knows what he is doing will be suprised to find that after update 'hg status' doesn't work. This commit makes also merge operation warns about missing parent when revision to merge exists only in the bundle.

tests: fix builtin module test on pypy On pypy datetime and cProfile are modules written in Python, not in C. For the purpose of this test, just list them explicitely as builtins, which silences warnings about them being imported before stdlib modules.

hgweb: generate last change date for an empty atom-bookmarks feed (issue5022) RFC 4287 states that atom feeds must have an <updated> element, so let's add one even when repo doesn't have a single bookmark.

hgweb: sort bookmarks in revlog order of their nodes Changes, branches and tags are already in revlog order on /summary, /branches and /tags, let's now make bookmarks be sorted by the same principle. It's more helpful to show more "recent" bookmarks on top. This will affect /bookmarks page in all styles, including atom, rss and raw, and also /summary page. Bookmarks are sorted using a (revision number, bookmark name) tuple.