fmt/fmt_test.go: count mallocs in a few more cases. Interesting that Fprintf can do zero mallocs. (Sprintf must allocate the returned string.)
fmt/fmt_test.go: count mallocs in a few more cases.
Interesting that Fprintf can do zero mallocs.
(Sprintf must allocate the returned string.)

R=golang-dev, bradfitz
CC=golang-dev
http://codereview.appspot.com/4977049

wesolows/golang,wesolows/golang,firebitsbr/golang-old,firebitsbr/golang-old,wesolows/golang-old,wesolows/golang-old,wesolows/golang,wesolows/golang-old,firebitsbr/golang-old,wesolows/golang,wesolows/golang,wesolows/golang,firebitsbr/golang-old,wesolows/golang-old,firebitsbr/golang-old,firebitsbr/golang-old,wesolows/golang-old,firebitsbr/golang-old,wesolows/golang-old,wesolows/golang,wesolows/golang-old,firebitsbr/golang-old