Auto merge of #143919 - Kobzol:rollup-acyaygs, r=Kobzol

Rollup of 10 pull requests

Successful merges:

 - rust-lang/rust#143217 (Port #[link_ordinal] to the new attribute parsing infrastructure)
 - rust-lang/rust#143681 (bootstrap/miri: avoid rebuilds for test builds)
 - rust-lang/rust#143724 (Tidy cleanup)
 - rust-lang/rust#143733 (Change bootstrap's `tool.TOOL_NAME.features` to work on any subcommand)
 - rust-lang/rust#143850 (Compiletest: Simplify {Html,Json}DocCk directive handling)
 - rust-lang/rust#143875 (update issue number for `const_trait_impl`)
 - rust-lang/rust#143881 (Use zero for initialized Once state)
 - rust-lang/rust#143887 (Run bootstrap tests sooner in the `x test` pipeline)
 - rust-lang/rust#143917 (Change "allocated object" to "allocation".)
 - rust-lang/rust#143918 (Tier check cleanup)

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

Author: bors

src/rustdoc-internals/rustdoc-test-suite.md

@@ -55,6 +55,9 @@ Similar to shell commands,
 directives can extend across multiple lines if their last char is `\`.
 In this case, the start of the next line should be `//`, with no `@`.
 
+Similar to compiletest directives, besides a space you can also use a colon `:` to separate
+the directive name and the arguments, however a space is preferred for HtmlDocCk directives.
+
 Use the special string `{{channel}}` in XPaths, `PATTERN` arguments and [snapshot files](#snapshot)
 if you'd like to refer to the URL `https://doc.rust-lang.org/CHANNEL` where `CHANNEL` refers to the
 current release channel (e.g, `stable` or `nightly`).