Added more tests

re_test.go

@@ -77,6 +77,7 @@ var reTests = []struct {
 	{"[^a]+", "qqqaq", []MatchIndex{{0, 3}, {4, 5}}},
 	{"[^0-9]+", "a1b2c3dd", []MatchIndex{{0, 1}, {2, 3}, {4, 5}, {6, 8}}},
 	{"[^abc]+", "ababababbababaccacacacaca", []MatchIndex{}},
+	{`\[`, "a[b[c[]]]", []MatchIndex{{1, 2}, {3, 4}, {5, 6}}},
 	{`\([^)]+\)`, "Not (paranthesized), (so) is (this) not", []MatchIndex{{4, 19}, {21, 25}, {29, 35}}},
 
 	{"^ab", "ab bab", []MatchIndex{{0, 2}}},
@@ -113,6 +114,7 @@ var reTests = []struct {
 	// Unicode tests
 	{`.+`, "úïäö´«åæïëòöê»éãçâï«úïòíñ", []MatchIndex{{0, 25}}},
 	{`a.b`, "a²b", []MatchIndex{{0, 3}}},
+	{`[^a]+`, "úïäö´«åæïëòöê»éãçâï«úïòíñ", []MatchIndex{{0, 25}}},
 }
 
 func TestFindAllMatches(t *testing.T) {