doc: fix typos in go1.1.html

R=golang-dev, adg, adg
CC=golang-dev
https://golang.org/cl/8488047

doc/go1.1.html

@@ -406,9 +406,9 @@ this sense, "<code>go run</code>" replaces "<code>go run *.go</code>".
 <h3 id="tags">Build constraints</h3>
 
 <p>
-The <code>"go1.1</code>" tag has been added to the list of default
+The "<code>go1.1</code>" tag has been added to the list of default
 <a href="/pkg/go/build/#hdr-Build_Constraints">build constraints</a>.
-This permits packages to take advanage of the new features in Go 1.1 while
+This permits packages to take advantage of the new features in Go 1.1 while
 remaining compatible with earlier versions of Go.
 </p>