editor: Qualify `RangeExt::overlaps` call to prevent phantom diagnostics (#18743)
Marshall Bowers
created
This PR qualifies a call to `RangeExt::overlaps` to avoid some confusion
in rust-analyzer not being able to distinguish between
`RangeExt::overlaps` and `AnchorRangeExt::overlaps` and producing
phantom diagnostics.
We may also want to consider renaming the method on `AnchorRangeExt` to
disambiguate them.
Release Notes:
- N/A