[#228]: bugfix for comment at eof

[joshfried-aws]

Issue #, if available:
#228

Description of changes:
Changed our logic for parsing comments to use the crate nom's function multispace0 which does

complete version: will return the whole input if no terminating token is found (a non space character)``` 
---
*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*