Implement our own rev-parse --top-level

pre_commit/hooks_workspace.py

@@ -10,6 +10,7 @@ from pre_commit import git
 def get_pre_commit_dir_path():
     return os.path.join(git.get_root(), C.HOOKS_WORKSPACE)
 
+
 @contextlib.contextmanager
 def in_hooks_workspace():
     """Change into the hooks workspace.  If it does not exist create it."""