Fix simple typo: usuaully -> usually (python#7958)

timgates42 · JelleZijlstra · commit f856e1569492 · 2019-11-15T20:55:56.000-08:00
diff --git a/mypy/renaming.py b/mypy/renaming.py
@@ -156,7 +156,7 @@ def visit_with_stmt(self, stmt: WithStmt) -> None:
         # convenience.  This is unsafe since with statements can affect control
         # flow by catching exceptions, but this is rare except for
         # assertRaises() and other similar functions, where the exception is
-        # raised by the last statement in the body, which usuaully isn't a
+        # raised by the last statement in the body, which usually isn't a
         # problem.
         stmt.body.accept(self)
 
