For example, being able to overwrite the comment syntax of the Scintilla lexer: the language is a C-style language but uses Ruby's syntax for comment: `#` instead of `//` for line comment and `=begin` and `=end` instead of `/*` and `*/` for block comment. Currently, this is impossible. The answer will always be go and add this to Scintilla. But, is this really needed? Notepad++ is also using Scintilla and as I know it can do this.