Fix various things
Fix various things

- 4 spaces for indentation
- Don't shadow the built-in name 'file'
- At the first except statement, return False, otherwise you might use a
  non-initialized variable at the for loop.
- You have to use `range` at the for loop to run over all items in a
  collection.
- True and False start with a capital letter.
- Don't compare to True/False with `== True`, but with `is True`

Jacob-Gray/WelcomeBot,Kubo2/WelcomeBot,michaelpri10/WelcomeBot,michaelpri10/WelcomeBot,Kubo2/WelcomeBot