document mistake

[gopherbot]

by mingjie.xing:

http://golang.org/ref/mem

Once

calling twoprint causes "hello, world" to be printed twice. The first call to
twoprint runs setup once.

should be,

calling twoprint causes "hello, world" to be printed twice. The first call to
doprint runs setup once.

[cznic]

Comment 1:

https://golang.org/cl/13183043

[bradfitz]

Comment 2:

This issue was closed by revision ad50f6b.

Status changed to Fixed.