Source Code comments containing old array syntax

Would a pull request fixing the source code comments be appreciated? I noticed that there were a few here and there in the source code.

I mean notations like `[T, ..n]` instead of `[T; n]` which was added in rfc#520

I ask because it is a minor change, and perhaps there is already a system in place for cleanup. (Which I did not find in Contributing.md)
