scm: git: more strict functional test.
scm: cvs: code clean up functional test.
scm: cvs: update test repository.
add "tag00" tag and "branch00" branch.
scm: cvs: code clean up model.
scm: cvs: code clean up adapter.
scm: darcs: code clean up model.
Adds a helper for issue heading (#7647).
Fixed no method error due to typo.
No need to query changesets if user is not allowed to view them.
Code cleanup.
