Rollup merge of rust-lang#81505 - henryboisdequin:cold_path-not-pub, r=sanxiyn

`fn cold_path` doesn't need to be pub

Fixes rust-lang#81429

Note: this PR also fixes a small typo that I found

Author: JohnTitor

compiler/rustc_arena/src/lib.rs

@@ -32,7 +32,7 @@ use std::slice;
 
 #[inline(never)]
 #[cold]
-pub fn cold_path<F: FnOnce() -> R, R>(f: F) -> R {
+fn cold_path<F: FnOnce() -> R, R>(f: F) -> R {
     f()
 }
 

compiler/rustc_resolve/src/diagnostics.rs

@@ -977,7 +977,7 @@ impl<'a> Resolver<'a> {
         });
         if let Some(def_span) = def_span {
             if span.overlaps(def_span) {
-                // Don't suggest typo suggestion for itself like in the followoing:
+                // Don't suggest typo suggestion for itself like in the following:
                 // error[E0423]: expected function, tuple struct or tuple variant, found struct `X`
                 //   --> $DIR/issue-64792-bad-unicode-ctor.rs:3:14
                 //    |