sort: fix comment for various Search routines Fixes issue 4205 (again).
sort: fix comment for various Search routines
Fixes issue 4205 (again).

R=r, 0xjnml
CC=golang-dev
http://codereview.appspot.com/6819082
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go