doc/effective_go.html: unify and expand the discussion of Sprintf and String It's a common mistake to build a recursive String method; explain it well and show how to avoid it.
doc/effective_go.html: unify and expand the discussion of Sprintf and String
It's a common mistake to build a recursive String method; explain it well and
show how to avoid it.

R=golang-dev, bradfitz, adg
CC=golang-dev
https://codereview.appspot.com/7486049

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