Rollup merge of rust-lang#64116 - ZeGentzy:patch-1, r=oli-obk

Fix minor typo in docs.

This comment is prolly refering to the comment in [const_eval_raw_provider](https://github.com/rust-lang/rust/pull/64116/files#diff-e0b58bb6712edaa8595ad7237542c958R616), not itself.

src/librustc/mir/interpret/value.rs

@@ -17,8 +17,8 @@ pub struct RawConst<'tcx> {
     pub ty: Ty<'tcx>,
 }
 
-/// Represents a constant value in Rust. `Scalar` and `ScalarPair` are optimizations that
-/// match the `LocalState` optimizations for easy conversions between `Value` and `ConstValue`.
+/// Represents a constant value in Rust. `Scalar` and `Slice` are optimizations for
+/// array length computations, enum discriminants and the pattern matching logic.
 #[derive(Copy, Clone, Debug, Eq, PartialEq, PartialOrd, Ord,
          RustcEncodable, RustcDecodable, Hash, HashStable)]
 pub enum ConstValue<'tcx> {

src/librustc_mir/const_eval.rs

@@ -589,7 +589,7 @@ pub fn const_eval_provider<'tcx>(
     tcx: TyCtxt<'tcx>,
     key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>,
 ) -> ::rustc::mir::interpret::ConstEvalResult<'tcx> {
-    // see comment in const_eval_provider for what we're doing here
+    // see comment in const_eval_raw_provider for what we're doing here
     if key.param_env.reveal == Reveal::All {
         let mut key = key.clone();
         key.param_env.reveal = Reveal::UserFacing;