[Issue 18998] Improve Operator Overloading docs

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18998

--- Comment #6 from Dlang Bot <dlang-bot at dlang.rocks> ---
@ntrel updated dlang/dlang.org pull request #3652 "[spec] Improve opCast &
`opCast!bool` docs" mentioning this issue:

- Part of
  Issue 18998 - Improve Operator Overloading docs

https://github.com/dlang/dlang.org/pull/3652

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