rustdoc: Elide const-unstable if also unstable overall

rustdoc: Elide const-unstable if also unstable overall · rust-lang/rust@fa7a3f9

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Original file line number	Diff line number	Diff line change
`@@ -1016,18 +1016,23 @@ fn render_stability_since_raw_with_extra(`
`1016`	`1016`	`.map(\|since\| (format!("const since {since}"), format!("const: {since}")))`
`1017`	`1017`	`}`
`1018`	`1018`	`Some(ConstStability { level: StabilityLevel::Unstable { issue, .. }, feature, .. }) => {`
`1019`		`-let unstable = if let Some(n) = issue {`
`1020`		`-format!(`
`1021`		`-"<a \`
	`1019`	`+if stable_version.is_none() {`
	`1020`	`+// don't display const unstable if entirely unstable`
	`1021`	`+None`
	`1022`	`+} else {`
	`1023`	`+let unstable = if let Some(n) = issue {`
	`1024`	`+format!(`
	`1025`	`+"<a \`
`1022`	`1026`	`href=\"https://github.com/rust-lang/rust/issues/{n}\" \`
`1023`	`1027`	`title=\"Tracking issue for {feature}\"\`
`1024`	`1028`	`>unstable</a>"`
`1025`		`-)`
`1026`		`-} else {`
`1027`		`-String::from("unstable")`
`1028`		`-};`
	`1029`	`+ )`
	`1030`	`+ } else {`
	`1031`	`+ String::from("unstable")`
	`1032`	`+ };`
`1029`	`1033`
`1030`		`-Some((String::from("const unstable"), format!("const: {unstable}")))`
	`1034`	`+Some((String::from("const unstable"), format!("const: {unstable}")))`
	`1035`	`+}`
`1031`	`1036`	`}`
`1032`	`1037`	`_ => None,`
`1033`	`1038`	`};`

Original file line number	Diff line number	Diff line change
`@@ -24,6 +24,12 @@ pub const unsafe fn foo_unsafe() -> u32 { 42 }`
`24`	`24`	`#[unstable(feature = "humans", issue = "none")]`
`25`	`25`	`pub const fn foo2() -> u32 { 42 }`
`26`	`26`
	`27`	`+// @has 'foo/fn.foo3.html' '//pre' 'pub fn foo3() -> u32'`
	`28`	`+// @!hasraw - '//span[@class="since"]'`
	`29`	`+#[unstable(feature = "humans", issue = "none")]`
	`30`	`+#[rustc_const_unstable(feature = "humans", issue = "none")]`
	`31`	`+pub const fn foo3() -> u32 { 42 }`
	`32`	`+`
`27`	`33`	`// @has 'foo/fn.bar2.html' '//pre' 'pub const fn bar2() -> u32'`
`28`	`34`	`// @has - //span '1.0.0 (const: 1.0.0)'`
`29`	`35`	`#[stable(feature = "rust1", since = "1.0.0")]`