ln5: "instrutions" => "instructions";
ln159: "immedate" => "immediate";

Change-Id: Ifb94a9c145d1911ed92f12883213245beee2bd67
GitHub-Last-Rev: 78627835e76c6d837a72badd5fc28ba27f0a6ff7
GitHub-Pull-Request: golang/go#28776
Reviewed-on: https://go-review.googlesource.com/c/149378Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>