libs: doc comments

src/libstd/keyword_docs.rs

@@ -260,7 +260,7 @@ mod extern_keyword { }
 /// }
 ///
 /// fn generic_where<T>(x: T) -> T
-///     where T: std::ops::Add<Output=T> + Copy
+///     where T: std::ops::Add<Output = T> + Copy
 /// {
 ///     x + x + x
 /// }
@@ -289,7 +289,7 @@ mod fn_keyword { }
 /// `for` is primarily used in for-in-loops, but it has a few other pieces of syntactic uses such as
 /// `impl Trait for Type` (see [`impl`] for more info on that). for-in-loops, or to be more
 /// precise, iterator loops, are a simple syntactic sugar over an exceedingly common practice
-/// within Rust, which is to loop over an iterator until that iterator returns None (or `break`
+/// within Rust, which is to loop over an iterator until that iterator returns `None` (or `break`
 /// is called).
 ///
 /// ```rust