7e9da40078
feat: add assist for applying De Morgan's law to `Iterator::all` and `Iterator::any` This PR adds an assist for transforming expressions of the form `!iter.any(|x| predicate(x))` into `iter.all(|x| !predicate(x))` and vice versa. [IteratorDeMorgans.webm](https://github.com/rust-lang/rust-analyzer/assets/52933714/aad1a299-6620-432b-9106-aafd2a7fa9f5) Closes #15694
rust-analyzer is a modular compiler frontend for the Rust language. It is a part of a larger rls-2.0 effort to create excellent IDE support for Rust.
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