go/format: fix failing test (fix build)

R=khr
CC=golang-dev
https://golang.org/cl/11131043

src/pkg/go/format/format_test.go

@@ -90,7 +90,6 @@ var tests = []string{
 	"\n\t\t\n\n\t\t\tx := 0\n\t\t\tconst s = `\nfoo\n`\n\n\n", // no indentation inside raw strings
 
 	// erroneous programs
-	"ERRORvar x",
 	"ERROR1 + 2 +",
 	"ERRORx :=  0",
 }