Auto merge of rust-lang#11133 - GuillaumeGomez:fix-description-typo, r=Manishearth

Fix typo in `needless_pass_by_ref_mut` lint description

Someone nicely showed me that I made a small typo in rust-lang/rust-clippy#10900.

changelog: none

Author: bors

clippy_lints/src/needless_pass_by_ref_mut.rs

@@ -22,7 +22,7 @@ declare_clippy_lint! {
     /// ### What it does
     /// Check if a `&mut` function argument is actually used mutably.
     ///
-    /// Be careful if the function is publically reexported as it would break compatibility with
+    /// Be careful if the function is publicly reexported as it would break compatibility with
     /// users of this function.
     ///
     /// ### Why is this bad?