Rollup merge of #32504 - tclfs:patch-1, r=steveklabnik

Docs: a tiny modification

Author: steveklabnik

src/doc/book/closures.md

@@ -502,5 +502,5 @@ assert_eq!(6, answer);
 ```
 
 By making the inner closure a `move Fn`, we create a new stack frame for our
-closure. By `Box`ing it up, we’ve given it a known size, and allowing it to
+closure. By `Box`ing it up, we’ve given it a known size, allowing it to
 escape our stack frame.