Squashed 'syntax/jsx/' changes from faa5682..10980f0

10980f0 Semi-fix for quotes surrounded by characters, most commonly found in JSX.

git-subtree-dir: syntax/jsx
git-subtree-split: 10980f017151844767941a9e2ff04917200f00a6
Merge commit '776e0a736062b42e352507c1990c7cd704a78a82' into jsx-fix

Update jsx syntax highlighting

Closes issue #7