go-tour: minor HTML/link error fixes         Fix issue 3421 for the go project.
go-tour: minor HTML/link error fixes
        Fix issue 3421 for the go project.

R=golang-dev, adg, r
CC=golang-dev
https://golang.org/cl/5946048

campoy/go-tour-ua,dupoxy/go-tour-fr,rofrol/go-tour-pl,golians/tour,shuLhan/tour,Go-zh/tour,bbandaru/tour,ybin/tour,LaPingvino/go-tour-eo,Jasperste/tour,Jasperste/tour,scryner/tour,LaPingvino/go-tour-nl,bbandaru/tour,Go-zh/tour,phoorichet/tour,LaPingvino/go-tour-nl,zorion/go-tour-ca,LaPingvino/go-tour-eo,dupoxy/go-tour-fr,shuLhan/tour,golang/tour,tamnd/tour,LaPingvino/go-tour-eo,raindev/tour,Go-zh/tour,phoorichet/tour,tamnd/tour,raindev/tour,rofrol/go-tour-pl,scryner/tour,ybin/tour,zorion/go-tour-ca,dupoxy/go-tour-fr,golians/tour,shuLhan/go-tour-id,rofrol/go-tour-pl,campoy/go-tour-ua,shuLhan/go-tour-id,ybin/tour,Jasperste/tour,LaPingvino/go-tour-nl,golians/tour,raindev/tour,campoy/go-tour-ua,shuLhan/tour,scryner/tour,shuLhan/go-tour-id,phoorichet/tour,Go-zh/tour,bbandaru/tour,tamnd/tour,scryner/tour