[Issue 18879] New: !is doesn't highlight correctly

[d-bugmail at puremagic.com]

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

          Issue ID: 18879
           Summary: !is doesn't highlight correctly
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P1
         Component: visuald
          Assignee: nobody at puremagic.com
          Reporter: turkeyman at gmail.com

`in` and `is()` are highlighted as keywords, but `!in` and `!is()` are not
highlighted correctly.

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