comply w/ pep8 E203+E241 (aligning operators w/ whitespace)

Relevant parts of PEP 8:
> #### Whitespace in Expressions and Statements
> ##### Pet Peeves
> Avoid extraneous whitespace in the following situations:
> * Immediately before a comma, semicolon, or colon
> * More than one space around an assignment (or other) operator to align it with another.

I couldn't find anything contradictory in the Salt Coding Style guide, but I'll understand if there's an unwritten Salt convention about this.