Fix wrong error message expectation in API::Commits spec
See commit message or https://gitlab.com/gitlab-org/gitlab-ce/issues/25651#note_19996076 for the explanation.
Closes #25651 (closed)
See commit message or https://gitlab.com/gitlab-org/gitlab-ce/issues/25651#note_19996076 for the explanation.
Closes #25651 (closed)