fix(encoding for file): fixed support of non utf-8 files in all backends

rhodecode/api/tests/test_get_repo_comments.py

@@ -19,6 +19,7 @@
 
 import pytest
 
+from rhodecode.lib.str_utils import safe_str
 from rhodecode.model.db import User, ChangesetComment
 from rhodecode.model.meta import Session
 from rhodecode.model.comment import CommentsModel
@@ -36,7 +37,7 @@ def make_repo_comments_factory(request):
             commit = repo.scm_instance()[0]
 
             commit_id = commit.raw_id
-            file_0 = commit.affected_files[0]
+            file_0 = safe_str(commit.affected_files[0])
             comments = []
 
             # general