Fix XML empty element handling

Change-Id: I80a1653685e221731f9be889b2794f3bc6a38cf2
diff --git a/matrix_test.go b/matrix_test.go
index 1a3f7b0..f985736 100644
--- a/matrix_test.go
+++ b/matrix_test.go
@@ -873,6 +873,13 @@
 	assert.Equal("Mann", tokens[8])
 	assert.Equal(".", tokens[9])
 	assert.Equal(10, len(tokens))
+
+	tokens = ttokenize(mat, w, "das<br   class=\"br\" />ging.")
+	assert.Equal("das", tokens[0])
+	assert.Equal("<br   class=\"br\" />", tokens[1])
+	assert.Equal("ging", tokens[2])
+	assert.Equal(".", tokens[3])
+	assert.Equal(4, len(tokens))
 }
 
 func TestMatokDatokEquivalence(t *testing.T) {