[9999] Add percent symbol as "string operator"

psf · May 31, 2021 · f2ccbf5 · f2ccbf5
1 parent e120f45
commit f2ccbf5
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Showing 2 changed files with 13 additions and 5 deletions.
diff --git a/src/black/trans.py b/src/black/trans.py
@@ -739,14 +739,15 @@ class BaseStringSplitter(StringTransformer):
     """
 
     STRING_OPERATORS = [
-        token.PLUS,
-        token.STAR,
         token.EQEQUAL,
-        token.NOTEQUAL,
-        token.LESS,
-        token.LESSEQUAL,
         token.GREATER,
         token.GREATEREQUAL,
+        token.LESS,
+        token.LESSEQUAL,
+        token.NOTEQUAL,
+        token.PERCENT,
+        token.PLUS,
+        token.STAR,
     ]
 
     @abstractmethod

diff --git a/tests/data/long_strings__edge_case.py b/tests/data/long_strings__edge_case.py
@@ -31,6 +31,7 @@
 return f'{x}/b/c/d/d/d/dadfjsadjsaidoaisjdsfjaofjdfijaidfjaodfjaoifjodjafojdoajaaaaaaaaaaaa'
 assert str(result) == "This long string should be split at some point right close to or around hereeeeeee"
 assert str(result) < "This long string should be split at some point right close to or around hereeeeee"
+assert "A format string: %s" % "This long string should be split at some point right close to or around hereeeeeee" != result
 
 
 # output
@@ -120,3 +121,9 @@
     < "This long string should be split at some point right close to or around"
     " hereeeeee"
 )
+assert (
+    "A format string: %s"
+    % "This long string should be split at some point right close to or around"
+    " hereeeeeee"
+    != result
+)