evolve: scattered typo fixes in comments, docstrings

evolve: extract logic to new method _finalizerelocate This patch introduces a new method _finalizerelocate to finalize current state after merge states in relocate method. This simplifies the code of the method relocate and allows us to modify it later to support a continued keywork to implement evolve state.

evolve: extract logic to new method _relocatecommit This patch introduces a new method _relocatecommit to commit current state after merge states in relocate method. This simplifies the code of the method relocate and allows us to modify it later to support a continued keywork to implement evolve state.

evolve: apply API change to 'merge.update' Mercurial core43c00ca887d1 (future 3.7) changed the signature of the 'mercurial.merge.update', this impact our code so we update it. This

debian: don't refer to deleted tests/run-tests.py in debian/rules tests/run-tests.py was deleted in 25a0c31882df (tests: remove the custom run-tests.py, 2015-11-02), but we still refer to it in debian/rules. Fix by having the user define a HGSRC variable when calling 'debuild' (with e.g '-e HGSRC=~/hg').

prune: changing bookmark argument to be a list Currently prune works with a single bookmark the changes in this patch modifies the prune command to accept a list of bookmarks Also changes to inhibit module which internally calls the cmdprune function. the change is to wrap the bookmark input into a list.

prune: remove a list of bookmarks Currently prune works with a single bookmark, the changes in this patch modifies the prune module to work with a list of bookmarks Building on this we can take a list of bookmarks as input and remove all of them in a single go