strings: fix off-by-one error in test

Previously it would panic because of out-of-bound access
if s1 is longer than s2.

LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews
https://golang.org/cl/90110043

diff --git a/src/pkg/strings/strings_test.go b/src/pkg/strings/strings_test.go
index 8347818d593df2b4bc6d5449fa852b043179c762..95a42019a3f0d46d93eec006449acf9fa4ce0d72 100644 (file)
--- a/src/pkg/strings/strings_test.go
+++ b/src/pkg/strings/strings_test.go
@@ -652,7 +652,7 @@ func equal(m string, s1, s2 string, t *testing.T) bool {
        e1 := Split(s1, "")
        e2 := Split(s2, "")
        for i, c1 := range e1 {
-               if i > len(e2) {
+               if i >= len(e2) {
                        break
                }
                r1, _ := utf8.DecodeRuneInString(c1)