revset: make analyze() a separate step from optimize() This will allow us to evaluate unoptimized tree and compare the result with optimized one. The private _analyze() function isn't renamed since I'll add more parameters to it.

revset: extract tree transformation from optimize() This patch separates the simple tree transformation from the optimization step, which is called as _analyze() since I'll extend this function to infer ordering flags. I want to avoid making _optimize() more complicated. This will also allow us to evaluate unoptimized tree.

hghave: fix has_bzr() to not try to import RevisionSpec as module Since RevisionSpec isn't a module, "import bzrlib.revisionspec.RevisionSpec" would always raise ImportError.

update: label bookmark name in message We label bookmark name as such in various messages. This will help them to standout (or at least give the user the option to make them stand out). We use a distinct label for the 'active' bookmark, this can help users to catch bookmark operation affecting their working copy.

discovery: explicitly check for None in outgoing init f09d0004481c introduced default params for discovery.outgoing(), but it used a falsy check instead of an explicit check for None. The result is that callers that passed in an empty list would have that list overridden by the defaults, which is not the expected behavior. This was discovered by changes to the test-pushrebase.t test in Facebook's repository of mercurial extensions.

import: report directory-relative paths in error messages (issue5224) Import uses paths relative to the root of the repository, so when user imports patch with paths relative to the current working directory import aborts with 'unable to find file for patching'. This patch improves this situation by warning the user that paths are relative to the root of repository when patching fails.