Enable build isolation under CIWB (#3297)

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

diff --git a/src/black/trans.py b/src/black/trans.py
index 7ecfcef703d26e4ae9963254c4963c8561103d8e..7e2d8e67c1acc1ffee6196c9d822bfe9936ad66b 100644 (file)
--- a/src/black/trans.py
+++ b/src/black/trans.py
@@ -1071,6 +1071,16 @@ class BaseStringSplitter(StringTransformer):
             # And the string is surrounded by commas (or is the first/last child)...
             prev_sibling = LL[0].prev_sibling
             next_sibling = LL[0].next_sibling
+            if (
+                not prev_sibling
+                and not next_sibling
+                and parent_type(LL[0]) == syms.atom
+            ):
+                # If it's an atom string, we need to check the parent atom's siblings.
+                parent = LL[0].parent
+                assert parent is not None  # For type checkers.
+                prev_sibling = parent.prev_sibling
+                next_sibling = parent.next_sibling
             if (not prev_sibling or prev_sibling.type == token.COMMA) and (
                 not next_sibling or next_sibling.type == token.COMMA
             ):
@@ -1246,7 +1256,7 @@ class StringSplitter(BaseStringSplitter, CustomSplitMapMixin):
 
         string_op_leaves = self._get_string_operator_leaves(LL)
         string_op_leaves_length = (
-            sum([len(str(prefix_leaf)) for prefix_leaf in string_op_leaves]) + 1
+            sum(len(str(prefix_leaf)) for prefix_leaf in string_op_leaves) + 1
             if string_op_leaves
             else 0
         )