Fix MovedIn20Warning docstring (#12237)

Remove reference of RemovedIn20Warning

diff --git a/lib/sqlalchemy/exc.py b/lib/sqlalchemy/exc.py
index 71e5dd81e0bb1bb2ef74a027fe99a44db6d9f96c..d27324475eb64fcab3249164a25de69e6316c0e3 100644 (file)
--- a/lib/sqlalchemy/exc.py
+++ b/lib/sqlalchemy/exc.py
@@ -813,7 +813,7 @@ class LegacyAPIWarning(Base20DeprecationWarning):
 
 
 class MovedIn20Warning(Base20DeprecationWarning):
-    """Subtype of RemovedIn20Warning to indicate an API that moved only."""
+    """Subtype of Base20DeprecationWarning to indicate an API that moved only."""
 
 
 class SAPendingDeprecationWarning(PendingDeprecationWarning):