Tweak tokenizer colors, spacing

Summary: Fixes T4441, minor tweaks to color and spacing

Test Plan: test 0, 1, and lots of tokens.

Reviewers: epriestley, btrahan

Reviewed By: epriestley

CC: Korvin, epriestley, aran

Maniphest Tasks: T4441

Differential Revision: https://secure.phabricator.com/D8258