Rollup merge of rust-lang#146319 - justinyaodu:patch-1, r=jhpratt

Fix typo in default.rs

This sentence currently reads:

> Rust implements `Default` for various primitives types.

I think it should just be "primitive types".

Author: matthiaskrgr

library/core/src/default.rs

@@ -33,7 +33,7 @@ use crate::ascii::Char as AsciiChar;
 /// }
 /// ```
 ///
-/// Now, you get all of the default values. Rust implements `Default` for various primitives types.
+/// Now, you get all of the default values. Rust implements `Default` for various primitive types.
 ///
 /// If you want to override a particular option, but still retain the other defaults:
 ///