templater: factor out type conversion of revset() result This makes it clear why we have to do repo[int(x)].

templater: evaluate each item of revset() as integer revision Because templater.revset() returns a list of strings, repo["-1"] was mapped to the tipmost revision. Ideally, we should make revset() return a list of integer revisions, but it turned out not simple. If revset() is a list of integers, "{ifcontains(rev, revset(), ...)}" would fail because "ifcontains" casts "rev" to a string. So this patch just converts a string back to an integer revision.

demandimport: blacklist sqlalchemy.events as it has side effects (issue5085) Importing sqlalchemy.events cannot be delayed as it registers classes to their event mechanism. It worked fine before 4f1144c3c72b, since they use new-style imports. But now we have to blacklist it because our demandimport can handle new-style imports. This patch series isn't intended for stable as we don't guarantee API compatibility with 3rd-party extensions. They can temporarily disable the demand importer to work around the issue.