feat: Implement per-edition preludes #9097
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Sep 10, 2021
7809: RES: Fix injecting prelude in 2021 edition r=Undin a=dima74 Fixes #7796 Related: rust-lang/rust-analyzer#9097 changelog: Use correct prelude for 2021 edition Co-authored-by: Dmitry Murzin <diralik@yandex.ru>
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Part of #9056
Our previous implementation was incorrect (presumably because of the misleading comment in libstd here).
#[prelude_import]does not define the prelude, it can only override the implicit prelude for the current crate.This PR fixes that, which also makes the prelude imports in
rustc_spanwork. Closes #8815.bors r+