Support function calls

[umanghome]

Before:

After:

This will break if the function call spans multiple lines as TextMate Grammar can only match single lines. microsoft/vscode-textmate#32

I'm not very familiar with TextMate Grammars. This might not even be the correct way to solve the problem of function calls.

[jasonwilliams]

Thanks for the contribution @umanghome hopefully you can help on other issues too!

[jasonwilliams]

@umanghome was there an issue this was tied to?

[umanghome]

Not for function calls. I was trying to fix #233 and function calls together.

[jasonwilliams]

@umanghome are you still working on #233 then?

[umanghome]

#233 can't be fixed as function declarations usually span multiple lines and TextMate Grammar doesn't support matching multiple lines. microsoft/vscode-textmate#32

I'll comment this on the issue and the one linked to it.