Highlighting of comments is broken when code is dense

[softwarecreations]

To reproduce, create a new file with highlighting orktes/atom-react "Javascript (JSX)" highlighting and paste this in:

const i = Math.random()*100;

//comment highlighted correctly

if (i< 40) console.log('foo');
//comment highlighted correctly

if (i<40) console.log('foo');
//comment highlighting broken because grammar file has bug thinking that <40 is the opening of a JSX tag.
//Silly because a JSX tag should not be openable with a number.

const test=20;
if (i<test) console.log('foo');
//another comment to test if the above line breaks highlighting after the fix.

Suggested simple solution JSX tags should only be openable if they are preceeded by \n or \s