text/template, html/template: fix block example name

Change-Id: I004a43842430201296363a9745480bee94920041
Reviewed-on: https://go-review.googlesource.com/15084Reviewed-by: Andrew Gerrand <adg@golang.org>

src/html/template/example_test.go

@@ -124,7 +124,7 @@ func Example_escape() {
 
 // The following example is duplicated in text/template; keep them in sync.
 
-func ExampleBlock() {
+func ExampleTemplate_block() {
 	const (
 		master  = `Names:{{block "list" .}}{{"\n"}}{{range .}}{{println "-" .}}{{end}}{{end}}`
 		overlay = `{{define "list"}} {{join . ", "}}{{end}} `

src/text/template/example_test.go

@@ -76,7 +76,7 @@ Josie
 
 // The following example is duplicated in html/template; keep them in sync.
 
-func ExampleBlock() {
+func ExampleTemplate_block() {
 	const (
 		master  = `Names:{{block "list" .}}{{"\n"}}{{range .}}{{println "-" .}}{{end}}{{end}}`
 		overlay = `{{define "list"}} {{join . ", "}}{{end}} `