message: Improve wording a little.
diff: @@ -1183,7 +1183,8 @@ pub fn tbaa_label(
  //
  // LLVM TBAA supports many features, but we use it in a simple way, with
  // only scalar types that are children of the root node. Every TBAA type we
  - // declare is `noalias` with the others:
  + // declare is NoAlias with the others. See NoAlias, PartialAlias,
  + // MayAlias and MustAlias in the LLVM documentation:
  // https://llvm.org/docs/AliasAnalysis.html#must-may-and-no-alias-responses
  let module = module.borrow_mut();
  