effective_go.html: Fix two links This fixes two intra-page "type assertion" links that were broken in different ways.
effective_go.html: Fix two links
This fixes two intra-page "type assertion" links that were broken in
different ways.

R=golang-dev, dsymonds
CC=golang-dev
https://codereview.appspot.com/9797043

Committer: David Symonds <7f6bb564ed9e580d4f0aa90d53b34578e5d24cb9@golang.org>

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