scm: filesystem: replace RAILS_ROOT to Rails.root in unit model test.
scm: filesystem: replace RAILS_ROOT to Rails.root in unit adapter test.
scm: mercurial: replace RAILS_ROOT to Rails.root in functional test.
scm: mercurial: replace RAILS_ROOT to Rails.root in unit model test.
scm: mercurial: replace RAILS_ROOT to Rails.root in unit adapter test.
scm: darcs: replace RAILS_ROOT to Rails.root in functional test.
scm: darcs: replace RAILS_ROOT to Rails.root in unit model test.
scm: darcs: replace RAILS_ROOT to Rails.root in unit adapter test.
Merged r6042 from trunk.
scm: mercurial: fix unit adapter annotate test fails on Windows Mercurial 1.8.4+29-e597ef52a7c2.
Merged r6041 from trunk.
scm: mercurial: add functional test of annotate file which does not exist in *tip* is not found.