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Rollup merge of #80495 - jyn514:rename-empty, r=petrochenkov

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Rename kw::Invalid -> kw::Empty

See https://rust-lang.zulipchat.com/#narrow/stream/182449-t-compiler.2Fhelp/topic/Is.20there.20a.20symbol.20for.20the.20empty.20string.3F/near/220054471
for context.

r? `@petrochenkov`
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Mara Bos 2020-12-30 20:56:58 +00:00 • committed by GitHub
commit 9e8edc8c22
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27 changed files with 46 additions and 46 deletions
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compiler/rustc_hir/src/hir.rs
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@ -28,7 +28,7 @@ pub struct Lifetime {
pub span: Span,
/// Either "`'a`", referring to a named lifetime definition,
/// or "``" (i.e., `kw::Invalid`), for elision placeholders.
/// or "``" (i.e., `kw::Empty`), for elision placeholders.
///
/// HIR lowering inserts these placeholders in type paths that
/// refer to type definitions needing lifetime parameters,