syntax highlighting not correct with multiple named return values of the same type.

[jjszaniszlo]

Hi, it seems that syntax highlighting doesn't correctly work when multiple named return values are used and have the same type. Attached is an image showcasing this.

[ap29600]

Hi, I'm not currently working on this syntax, so while I would very much appreciate and accept a patch, I'm not sure when I will be able to look into this myself.
If you really care about a robust syntax I would point you to this one which seems to be more mature