Commit suggestion (will squash later)

Co-authored-by: Camille Gillot <gillot.camille@gmail.com>

compiler/rustc_mir_transform/src/const_prop.rs

@@ -806,7 +806,7 @@ impl<'tcx> Visitor<'tcx> for ConstPropagator<'_, 'tcx> {
         // This loop can get very hot for some bodies: it check each local in each bb.
         // To avoid this quadratic behaviour, we only clear the locals that were modified inside
         // the current block.
-        // The order in which we remove constness does not matter.
+        // The order in which we remove consts does not matter.
         #[allow(rustc::potential_query_instability)]
         for local in written_only_inside_own_block_locals.drain() {
             debug_assert_eq!(