Fix grammar for type alias support (#3949)

[etc/vim.git] / src / black / trans.py

diff --git a/src/black/trans.py b/src/black/trans.py
index daed26427d79f2518cec3df0ff32f6e82025506e..a2bff7f227adb51bf1afa96242393384041374ed 100644 (file)
--- a/src/black/trans.py
+++ b/src/black/trans.py
@@ -1,6 +1,7 @@
 """
 String transformers that can split and merge strings.
 """
+
 import re
 from abc import ABC, abstractmethod
 from collections import defaultdict
@@ -942,6 +943,9 @@ class StringParenStripper(StringTransformer):
                 LL[lpar_or_rpar_idx].remove()  # Remove lpar.
                 replace_child(LL[idx], string_leaf)
                 new_line.append(string_leaf)
+                # replace comments
+                old_comments = new_line.comments.pop(id(LL[idx]), [])
+                new_line.comments.setdefault(id(string_leaf), []).extend(old_comments)
             else:
                 LL[lpar_or_rpar_idx].remove()  # This is a rpar.