Syntax highlight bug: '\r'|'\n'

This (slimmed down) function:
```scala
def consume (c : Char) {
state =
(state,c) match {
case (HeaderLine(ln),'\r'|'\n') => { processHeaderLine(ln) ; NextLine(""+c) }
}
}
```
renders as this:


Adding spaces like `'\r' | '\n'` fixes the issue.

Reproduce the reported rendering with the Scala snippet, then inspect the syntax-highlighting grammar or rules used for character literals and the `|` operator. Verify the fix against both `'\r'|'\n'` and `'\r' | '\n'`, and confirm the rendered highlighting is correct.

Written by the indexing model from the issue text.