X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/e401b6bb1e1c0ed534bba59d9dc908caf7ba898c..4da0851809e024760d3861ff43309125de34157a:/src/black/strings.py

diff --git a/src/black/strings.py b/src/black/strings.py
index 262c2ba..9d0e2eb 100644
--- a/src/black/strings.py
+++ b/src/black/strings.py
@@ -149,6 +149,10 @@ def normalize_string_prefix(s: str) -> str:
         .replace("U", "")
         .replace("u", "")
     )
+
+    # Python syntax guarantees max 2 prefixes and that one of them is "r"
+    if len(new_prefix) == 2 and "r" != new_prefix[0].lower():
+        new_prefix = new_prefix[::-1]
     return f"{new_prefix}{match.group(2)}"