Auto merge of rust-lang#102331 - notriddle:rollup-dmefd2d, r=notriddle

Rollup of 6 pull requests

Successful merges:

 - rust-lang#102283 (Improve code example for Option::unwrap_or_default)
 - rust-lang#102319 (rustdoc: merge CSS `table` rules into `.docblock`)
 - rust-lang#102321 ( Rustdoc-Json: List impls for primitives)
 - rust-lang#102322 (Document that Display automatically implements ToString)
 - rust-lang#102325 (rustdoc: give `.line-number` / `.line-numbers` meaningful names)
 - rust-lang#102326 (rustdoc: Update doc comment for splitn_mut to include mutable in the …)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

core/src/fmt/mod.rs

@@ -709,12 +709,19 @@ pub use macros::Debug;
 
 /// Format trait for an empty format, `{}`.
 ///
+/// Implementing this trait for a type will automatically implement the
+/// [`ToString`][tostring] trait for the type, allowing the usage
+/// of the [`.to_string()`][tostring_function] method. Prefer implementing
+/// the `Display` trait for a type, rather than [`ToString`][tostring].
+///
 /// `Display` is similar to [`Debug`], but `Display` is for user-facing
 /// output, and so cannot be derived.
 ///
 /// For more information on formatters, see [the module-level documentation][module].
 ///
 /// [module]: ../../std/fmt/index.html
+/// [tostring]: ../../std/string/trait.ToString.html
+/// [tostring_function]: ../../std/string/trait.ToString.html#tymethod.to_string
 ///
 /// # Examples
 ///

core/src/slice/mod.rs

@@ -2076,7 +2076,7 @@ impl<T> [T] {
         SplitN::new(self.split(pred), n)
     }
 
-    /// Returns an iterator over subslices separated by elements that match
+    /// Returns an iterator over mutable subslices separated by elements that match
     /// `pred`, limited to returning at most `n` items. The matched element is
     /// not contained in the subslices.
     ///