Commit719eee2

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test: add tests for extern preludes resolving in local mods

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Original file line number	Diff line number	Diff line change
`@@ -528,3 +528,65 @@ fn f() {$0`
`528`	`528`	`"#]],`
`529`	`529`	`)`
`530`	`530`	`}`
	`531`	`+`
	`532`	`+#[test]`
	`533`	`+fnresolve_extern_prelude_in_block(){`
	`534`	`+check_at(`
	`535`	`+r#"`
	`536`	`+//- /main.rs crate:main deps:core`
	`537`	`+fn main() {`
	`538`	`+ mod f {`
	`539`	`+ use core::S;`
	`540`	`+ $0`
	`541`	`+ }`
	`542`	`+}`
	`543`	`+`
	`544`	`+//- /core.rs crate:core`
	`545`	`+pub struct S;`
	`546`	`+ "#,`
	`547`	`+expect![[r#"`
	`548`	`+ block scope`
	`549`	`+ f: t`
	`550`	`+`
	`551`	`+ block scope::f`
	`552`	`+ S: ti vi`
	`553`	`+`
	`554`	`+ crate`
	`555`	`+ main: v`
	`556`	`+ "#]],`
	`557`	`+)`
	`558`	`+}`
	`559`	`+`
	`560`	`+#[test]`
	`561`	`+fnshadow_extern_prelude_in_block(){`
	`562`	`+check_at(`
	`563`	`+r#"`
	`564`	`+//- /main.rs crate:main deps:core`
	`565`	`+fn main() {`
	`566`	`+ mod core { pub struct S; }`
	`567`	`+ {`
	`568`	`+ fn inner() {} // forces a block def map`
	`569`	`+ use core::S; // should resolve to the local one`
	`570`	`+ $0`
	`571`	`+ }`
	`572`	`+}`
	`573`	`+`
	`574`	`+//- /core.rs crate:core`
	`575`	`+pub const S;`
	`576`	`+ "#,`
	`577`	`+expect![[r#"`
	`578`	`+ block scope`
	`579`	`+ S: ti vi`
	`580`	`+ inner: v`
	`581`	`+`
	`582`	`+ block scope`
	`583`	`+ core: t`
	`584`	`+`
	`585`	`+ block scope::core`
	`586`	`+ S: t v`
	`587`	`+`
	`588`	`+ crate`
	`589`	`+ main: v`
	`590`	`+ "#]],`
	`591`	`+)`
	`592`	`+}`

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