[x/blog] go.blog/constants: use a format with Printf Otherwise the prose around this snippet is confusing.
[x/blog] go.blog/constants: use a format with Printf
Otherwise the prose around this snippet is confusing.

LGTM=adg
R=adg
CC=golang-codereviews
https://golang.org/cl/130550043
X-Blog-Commit: f6ff936b5658c179ebcfdcd53609c7f675c70a76

golang/website,golang/website,golang/website,golang/website,golang/website,golang/website,golang/website