doc/effective_go.html: fix code example

Fixes #6595.

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/14425062

diff --git a/doc/effective_go.html b/doc/effective_go.html
index 30c015aea1c820e36f917bdc0013f59e6396735b..f9199511a31d98ff9fa5428887d2805ffc9adafe 100644 (file)
--- a/doc/effective_go.html
+++ b/doc/effective_go.html
@@ -795,6 +795,7 @@ This example shows both uses.
 <pre>
 Loop:
        for n := 0; n &lt; len(src); n += size {
+               switch {
                case src[n] &lt; sizeOne:
                        if validateOnly {
                                break