[JSCodeHints] HintUtils.maybeIdentifier excludes valid javascript identifiers

[petetronic]

From eztierney: "Noticed in the pull request to brackets main:

#3439

"This is obviously not a regression from current behavior, but I do wonder if this
code is going to fail on valid identifiers. Ahh, I see. It does fail some in that if I
have a variable called façade, if I type faç the hinting stops until I hit the a.
Anyhow, it's a minor point and nothing to fix now.""

[petetronic]

From eztierney: "I'm thinking we probably want to check the token - it looks like we always have access to it, and it should know if it is an identifier."

[dloverin]

I have a fix for this but it requires the latest version of tern (which also had the same problem) and acorn.

[dangoor]

Reviewed as part of reviewing code hinting issues.

[eztierney]

tern has been updated, and darrells fix got checked in some time ago.

[dloverin]

haven't checked in the fix yet.

[eztierney]

oops, I thought it was working when I tried it out, but now it is clearly not working.

[jodyzhang]

removed "fixed but not closed" label for later search.

[dloverin]

@jodyzhang Should be fixed by #3877

[jodyzhang]

Darrell helped me trace on one issue in tern: ternjs/tern#157, so wait for that resolved to close it

[jodyzhang]

this one need update from acorn, I did git clone acorn, I see it fixed.

[jodyzhang]

verified, acorn is updated, closed it.