Highlight block correctly in ERB file

[jbigler]

When highlighting the control block structure within an ERB file, if there is a block defining word used as a method argument keyword inside the block, it will match the end statement with that keyword instead of the control block.

With a class: argument in a method call (with or without parentheses):

Without the class: keyword, it works fine:

Calling class= as an HTML attribute is fine:

Within a normal Ruby .rb file, this does not occur:

[frandegrandis]

Hello!
Can i help with this one? I can try to fix it during the weekend!

[vinistock]

Sure. Feel free to put up a PR.