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`

1 files changed, 2 insertions, 2 deletions

diff --git a/compiler/rustc_target/src/asm/mod.rs b/compiler/rustc_target/src/asm/mod.rs
index 204d5d53361..1292f46f0c9 100644
--- a/compiler/rustc_target/src/asm/mod.rs
+++ b/compiler/rustc_target/src/asm/mod.rs
@@ -35,7 +35,7 @@ macro_rules! def_reg_class {
         impl $arch_regclass {
             pub fn name(self) -> rustc_span::Symbol {
                 match self {
-                    $(Self::$class => rustc_span::symbol::sym::$class,)*
+                    $(Self::$class => rustc_span::sym::$class,)*
                 }
             }
 
@@ -511,7 +511,7 @@ impl InlineAsmRegClass {
             Self::Msp430(r) => r.name(),
             Self::M68k(r) => r.name(),
             Self::CSKY(r) => r.name(),
-            Self::Err => rustc_span::symbol::sym::reg,
+            Self::Err => rustc_span::sym::reg,
         }
     }