replace exit(main()) with raise SystemExit(main())

Committed via https://github.com/asottile/all-repos

babi/__main__.py

@@ -3,4 +3,4 @@ from __future__ import annotations
 from babi.main import main
 
 if __name__ == '__main__':
-    exit(main())
+    raise SystemExit(main())

babi/main.py

@@ -152,4 +152,4 @@ def main(argv: Sequence[str] | None = None) -> int:
 
 
 if __name__ == '__main__':
-    exit(main())
+    raise SystemExit(main())

babi/textmate_demo.py

@@ -67,4 +67,4 @@ def main(argv: Sequence[str] | None = None) -> int:
 
 
 if __name__ == '__main__':
-    exit(main())
+    raise SystemExit(main())