Fix return type of __exit__ to bool

deveshks · deveshks · commit 58d8db334ec5 · 2020-05-22T13:25:12.000+05:30
diff --git a/src/pip/_internal/build_env.py b/src/pip/_internal/build_env.py
@@ -222,7 +222,7 @@ def __exit__(
         exc_val,  # type: Optional[BaseException]
         exc_tb  # type: Optional[TracebackType]
     ):
-        # type: (...) -> None
+        # type: (...) -> bool
         pass
 
     def cleanup(self):
