X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/74e51e6a829d48db1b4da4f1eac935647d1655cc..edf1c9dc0f20239b9d5351d8b0607c9e936dd43f:/src/black/__init__.py

diff --git a/src/black/__init__.py b/src/black/__init__.py
index e09838d8..7a7456ad 100644
--- a/src/black/__init__.py
+++ b/src/black/__init__.py
@@ -3611,13 +3611,14 @@ class StringSplitter(CustomSplitMapMixin, BaseStringSplitter):
     MIN_SUBSTR_SIZE = 6
     # Matches an "f-expression" (e.g. {var}) that might be found in an f-string.
     RE_FEXPR = r"""
-    (?<!\{)\{
+    (?<!\{) (?:\{\{)* \{ (?!\{)
         (?:
             [^\{\}]
             | \{\{
             | \}\}
+            | (?R)
         )+?
-    (?<!\})(?:\}\})*\}(?!\})
+    (?<!\}) \} (?:\}\})* (?!\})
     """
 
     def do_splitter_match(self, line: Line) -> TMatchResult: