Document private items for rustfmt

This is possible now that rustdoc allows passing
`--document-private-items` more than once.

src/bootstrap/doc.rs

@@ -619,7 +619,7 @@ impl Step for Rustc {
 }
 
 macro_rules! tool_doc {
-    ($tool: ident, $should_run: literal, $path: literal, [$($krate: literal),+ $(,)?], binary=$bin:expr) => {
+    ($tool: ident, $should_run: literal, $path: literal, [$($krate: literal),+ $(,)?] $(,)?) => {
         #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
         pub struct $tool {
             stage: u32,
@@ -688,9 +688,7 @@ macro_rules! tool_doc {
                     cargo.arg("-p").arg($krate);
                 )+
 
-                if !$bin {
                 cargo.rustdocflag("--document-private-items");
-                }
                 cargo.rustdocflag("--enable-index-page");
                 cargo.rustdocflag("--show-type-layout");
                 cargo.rustdocflag("-Zunstable-options");
@@ -700,19 +698,12 @@ macro_rules! tool_doc {
     }
 }
 
-tool_doc!(
-    Rustdoc,
-    "rustdoc-tool",
-    "src/tools/rustdoc",
-    ["rustdoc", "rustdoc-json-types"],
-    binary = false
-);
+tool_doc!(Rustdoc, "rustdoc-tool", "src/tools/rustdoc", ["rustdoc", "rustdoc-json-types"]);
 tool_doc!(
     Rustfmt,
     "rustfmt-nightly",
     "src/tools/rustfmt",
     ["rustfmt-nightly", "rustfmt-config_proc_macro"],
-    binary = true
 );
 
 #[derive(Ord, PartialOrd, Debug, Copy, Clone, Hash, PartialEq, Eq)]

src/tools/rustfmt/src/comment.rs

@@ -393,7 +393,7 @@ fn identify_comment(
 }
 
 /// Attributes for code blocks in rustdoc.
-/// See https://doc.rust-lang.org/rustdoc/print.html#attributes
+/// See <https://doc.rust-lang.org/rustdoc/print.html#attributes>.
 enum CodeBlockAttribute {
     Rust,
     Ignore,

src/tools/rustfmt/src/macros.rs

@@ -1417,7 +1417,7 @@ impl MacroBranch {
     }
 }
 
-/// Format `lazy_static!` from https://crates.io/crates/lazy_static.
+/// Format `lazy_static!` from <https://crates.io/crates/lazy_static>.
 ///
 /// # Expected syntax
 ///

src/tools/rustfmt/src/patterns.rs

@@ -22,11 +22,11 @@ use crate::utils::{format_mutability, mk_sp, mk_sp_lo_plus_one, rewrite_ident};
 /// Returns `true` if the given pattern is "short".
 /// A short pattern is defined by the following grammar:
 ///
-/// [small, ntp]:
+/// `[small, ntp]`:
 ///     - single token
 ///     - `&[single-line, ntp]`
 ///
-/// [small]:
+/// `[small]`:
 ///     - `[small, ntp]`
 ///     - unary tuple constructor `([small, ntp])`
 ///     - `&[small]`