pull-requests: handle case when removing existing files from a repository in versioning diff.

rhodecode/model/pull_request.py

@@ -970,7 +970,12 b' class PullRequestModel(BaseModel):'
 
             old_hash = old_files.get(new_filename)
             if not old_hash:
-                # file is not present in old diff, means it's added
+                # file is not present in old diff, we have to figure out from parsed diff
+                # operation ADD/REMOVE
+                operations_dict = diff_data['stats']['ops']
+                if diffs.DEL_FILENODE in operations_dict:
+                    removed_files.append(new_filename)
+                else:
                 added_files.append(new_filename)
             else:
                 if new_hash != old_hash: