Auto merge of #98038 - TaKO8Ki:remove-unnecessary-space-in-doc, r=compiler-errors

Remove an unnecessary space in doc

library/std/src/keyword_docs.rs

@@ -2199,7 +2199,7 @@ mod use_keyword {}
 /// pub enum Cow<'a, B>
 /// where
 ///     B: 'a + ToOwned + ?Sized,
-///  {
+/// {
 ///     Borrowed(&'a B),
 ///     Owned(<B as ToOwned>::Owned),
 /// }