[Issue 18879] !is doesn't highlight correctly

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=18879

--- Comment #2 from Manu <turkey...@gmail.com> ---
I think they should both be highlighted when used both as operators and as
keywords... so I don't think that distinction of case matters?

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