Rollup merge of rust-lang#62204 - Hywan:patch-2, r=rkruppe

doc(libcore) Fix CS

A small PR to fix a small CS typo in `iter/traits/collect.rs`.

Author: Centril

src/libcore/iter/traits/collect.rs

@@ -196,7 +196,7 @@ pub trait FromIterator<A>: Sized {
 /// ```rust
 /// fn collect_as_strings<T>(collection: T) -> Vec<String>
 ///     where T: IntoIterator,
-///           T::Item : std::fmt::Debug,
+///           T::Item: std::fmt::Debug,
 /// {
 ///     collection
 ///         .into_iter()