Fix typo

[garlic-os]

Description

Fixes a few typos in the ReadMe:

• Missing space after comma
• Double space
• raider.py still referred to as raiderDelay.py

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• I have added an explanation of what your changes do and why you'd like us to include them.
• I have written new tests for your core changes, as applicable.
• I have successfully ran tests with your changes locally.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[jlmaurer]

LGTM. Unit tests are not passing because of a timeout error.