bookmarks: enhance test of showing detail about incoming/outgoing bookmarks

bookmarks: show outgoing bookmarks more exactly Before this patch, "hg outgoing -B" shows only bookmarks added locally. Then, users can't know about bookmarks below before "hg push" execution. - deleted locally (even though it may be added remotely from "hg pull" view) - advanced locally - diverged - changed (= remote revision is unknown for local) This patch shows such bookmarks, too.

bookmarks: show incoming bookmarks more exactly Before this patch, "hg incoming -B" shows only bookmarks added remotely. Then, users can't know about bookmarks below before "hg pull" execution. - advanced remotely - diverged - changed (remote revision is unknown for local) This patch shows such bookmarks, too.

test-manifest: add some test coverage for treemanifest Similar to the testmanifest test case, testtreemanifest extends the base test case but uses treemanifests instead of manifestdicts. Adding this test provides some basic test coverage of treemanifest within the standard test suite.

test-manifest: make manifesttest a base class that is extended The implementation of the testmanifest test case is moved to a new base class, which is then extended to make the testmanifest. And instead of testmanifest, the subclass is named testmanifestdict because, well, that's what it's testing. This refactoring makes it possible to create alternate versions of what was formerly testmanifest, improving test coverage of different manifestdict implementations.

test-manifest: move parsemanifest() to be a testmanifest class method This refactoring lets testmanifest subclasses override this method to return different manifestdict implementations, such as treemanifest. It is useful for later commits where the testmanifest class is moved into a base class, and test cases that extend the base class can provide their own parsemanifest() implementation.