tests: add some comments to the unified test code [ original upstream message ]

tests: rewrite inline Python support Tests with inline Python could turn '>>>' into their underlying python invocation if the test got updated with -i. [ original upstream message ]

Backout b78cce2b1430 until a proper solution is found

Merge with stable

run-tests: make sure no_proxy/NO_PROXY are empty to fix test-http-proxy.t If no_proxy (or NO_PROXY) includes localhost, the test for detecting an unreachable proxy fails, because the proxy setting is ignored. [ original upstream message ]

keyword: use util.realpath instead of os.path.realpath This makes test-keyword.t pass on Python 2.4.1 (e.g. Debian sarge) [ original upstream message ]

Merge with default

Correct grammar in iskwfile docstring

Merge with stable

rollback: avoid unsafe rollback when not at tip (issue2998) You can get into trouble if you commit, update back to an older changeset, and then rollback. The update removes your valuable changes from the working dir, then rollback removes them history. Oops: you've just irretrievably lost data running nothing but core Mercurial commands. (More subtly: rollback from a shared clone that was already at an older changeset -- no update required, just rollback from the wrong directory.) The fix assumes that only "commit" transactions have irreplaceable data, and allows rolling back non-commit transactions as always. But when rolling back a commit, check that the working dir is checked out to tip, i.e. the changeset we're about to destroy. If not, abort. You can get back the old (dangerous) behaviour with --force. [ original upstream message ]