Auto merge of #134243 - nnethercote:re-export-more-rustc_span, r=jieyouxu

Re-export more `rustc_span::symbol` things from `rustc_span`.

`rustc_span::symbol` defines some things that are re-exported from `rustc_span`, such as `Symbol` and `sym`. But it doesn't re-export some closely related things such as `Ident` and `kw`. So you can do `use rustc_span::{Symbol, sym}` but you have to do `use rustc_span::symbol::{Ident, kw}`, which is inconsistent for no good reason.

This commit re-exports `Ident`, `kw`, and `MacroRulesNormalizedIdent`, and changes many `rustc_span::symbol::` qualifiers to `rustc_span::`. This is a 300+ net line of code reduction, mostly because many files with two `use rustc_span` items can be reduced to one.

r? `@jieyouxu`

2 files changed, 2 insertions, 4 deletions

diff --git a/compiler/rustc_infer/src/infer/mod.rs b/compiler/rustc_infer/src/infer/mod.rs
index f3fa3d3a1c8..5086b741a83 100644
--- a/compiler/rustc_infer/src/infer/mod.rs
+++ b/compiler/rustc_infer/src/infer/mod.rs
@@ -41,8 +41,7 @@ use rustc_middle::ty::{
     GenericParamDefKind, InferConst, IntVid, PseudoCanonicalInput, Ty, TyCtxt, TyVid,
     TypeVisitable, TypingEnv, TypingMode,
 };
-use rustc_span::Span;
-use rustc_span::symbol::Symbol;
+use rustc_span::{Span, Symbol};
 use snapshot::undo_log::InferCtxtUndoLogs;
 use tracing::{debug, instrument};
 use type_variable::TypeVariableOrigin;
diff --git a/compiler/rustc_infer/src/traits/util.rs b/compiler/rustc_infer/src/traits/util.rs
index a977bd15d3b..ab8ada1596c 100644
--- a/compiler/rustc_infer/src/traits/util.rs
+++ b/compiler/rustc_infer/src/traits/util.rs
@@ -1,7 +1,6 @@
 use rustc_data_structures::fx::FxHashSet;
 use rustc_middle::ty::{self, ToPolyTraitRef, TyCtxt};
-use rustc_span::Span;
-use rustc_span::symbol::Ident;
+use rustc_span::{Ident, Span};
 pub use rustc_type_ir::elaborate::*;
 
 use crate::traits::{self, Obligation, ObligationCauseCode, PredicateObligation};