Incorrect Comment Highlighting for "ini".

_From @sprinkle131313 on January 25, 2017 5:0_

It seems github has the same highlight error. The ";" character doesn't indicate a comment in the following context:

```ini
; comment
[Something]
VAR=%VAR%;addition
;        ^~~~~~ not a comment
```

_Copied from original issue: Microsoft/vscode#19336_