Lint for replacing x.strip_[prefix/suffix](...).unwrap_or(x) with x.trim_[prefix/suffix](...) #17779

What it does

Rust 1.100.0 will stabilize the str::trim_prefix() and trim_suffix() methods. The previous workaround for them was s.strip_[prefix/suffix](...).unwrap_or(s). I think we should have a lint for the new method.

Advantage

It's just simpler, and perhaps also faster.

Drawbacks

No response

Example

let s: &str;
s.strip_prefix("foo").unwrap_or(s)

Could be written as:

let s: &str;
s.trim_prefix("foo")

Comparison with existing lints

No response

Additional Context

No response