Fix some comment parsing tests.
Fix some comment parsing tests.

This makes sure those tests are in line with upstream. I also brought in
a couple tiny changes that showed up when diffing against upstream
(empty line, extra comma).

thr0w/esprima,facebook/esprima,kittens/esprima,facebook/esprima,fishbar/esprima,fishbar/esprima,thr0w/esprima,kittens/esprima,sebmck/esprima,facebookarchive/esprima,fishbar/esprima,sebmck/esprima,thr0w/esprima,facebook/esprima,facebookarchive/esprima,facebookarchive/esprima