Updated formatting

Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>

Author: radarhere

src/PIL/ImageShow.py

@@ -151,7 +151,7 @@ def show_file(self, file, **options):
             [
                 sys.executable,
                 "-c",
-                "import os, sys, time;time.sleep(20);os.remove(sys.argv[1])",
+                "import os, sys, time; time.sleep(20); os.remove(sys.argv[1])",
                 file,
             ]
         )