X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/f298032ddb624067aebc49f792b4308aeeb1841d..799f76f537f72ade97b8e6637c59fee49e05a4ab:/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)}"