Detecting Docs.rs doc conflict with a clippy lint

[Stargateur]

Detecting Docs.rs give a code example:

if let Ok(_) = std::env::var("DOCS_RS") {
    // ... your code here ...
}

This generate a lint from clippy redundant_pattern_matching:

 error: redundant pattern matching, consider using `is_ok()`
  --> build.rs:43:12
   |
43 |     if let Ok(_) = std::env::var("DOCS_RS") {
   |     -------^^^^^--------------------------- help: try this: `if std::env::var("DOCS_RS").is_ok()`
   |
   = note: `-D clippy::redundant-pattern-matching` implied by `-D warnings`
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching

I'm not a big fan of this lint cause I prefer the if let Ok(_) style but that still a default lint of clippy for now so maybe doc should reflect clippy advice.

if std::env::var("DOCS_RS").is_ok() {
    // ... your code here ...
}