Fix OOB error and improve tests

md2htmlV2.go

@@ -178,7 +178,7 @@ func (cv ConverterV2) md2html(in []rune, enableButtons bool) (string, []ButtonV2
 			return out.String() + "<" + chars[item] + ">" + nestedT + "</" + closeSpans(chars[item]) + ">" + followT, append(nestedB, followB...)
 
 		case '&':
-			if !(i+3 < len(in) && in[i+1] == 'g' && in[i+2] == 't' && in[i+3] == ';') {
+			if !(i+4 < len(in) && in[i+1] == 'g' && in[i+2] == 't' && in[i+3] == ';') {
 				out.WriteRune(c)
 				continue
 			}

md2htmlV2_test.go

@@ -114,6 +114,9 @@ func TestNotMD2HTMLV2(t *testing.T) {
 		}, {
 			in:  "|noop|",
 			out: "|noop|",
+		}, {
+			in:  "end with >",
+			out: "end with >",
 		}, {
 			in:  "no premium ! in text", // confirm that a '!' doesnt break premiums
 			out: "no premium ! in text",

reverseV2_test.go

@@ -28,7 +28,9 @@ func TestReverseV2(t *testing.T) {
 	for _, test := range []string{
 		"___________test_______",
 		"|||||spoiler|||",
-		`![👍](tg://emoji?id=5368324170671202286)`,
+		"![👍](tg://emoji?id=5368324170671202286)",
+		">",
+		"test\n>\ntest",
 	} {
 		out, err := tg_md2html.ReverseV2(tg_md2html.MD2HTMLV2(test), nil)
 		assert.NoError(t, err, "Error for:\n%s", test)