fix(app): Adjusted accordingly to PR suggestions. Fixes: RCCE-37

rhodecode/apps/repository/views/repo_files.py

@@ -812,7 +812,7 b' class RepoFilesView(RepoAppView):'
                   "filename=\"{}\"; " \
                   "filename*=UTF-8\'\'{}".format(safe_path, encoded_path)
 
-        return headers.encode().decode('iso-8859-1', errors='replace')
+        return safe_bytes(headers).decode('latin-1', errors='replace')
 
     @LoginRequired()
     @HasRepoPermissionAnyDecorator(