Fixed bug with parentheses in lookaround regex; fixed bug with reading last line of test string (if it doesn't end in a newline)

main.go

@@ -156,7 +156,7 @@ func shuntingYard(re string) []postfixNode {
 		*/
 		c := re_postfix[i]
 		if isNormalChar(c) {
-			if *caseInsensitiveFlag {
+			if caseInsensitiveFlag != nil && *caseInsensitiveFlag {
 				outQueue = append(outQueue, newPostfixNode(allCases(c)...))
 			} else {
 				outQueue = append(outQueue, newPostfixNode(c))
@@ -204,9 +204,6 @@ func shuntingYard(re string) []postfixNode {
 				regex += string(re_postfix[i])
 				i++
 			}
-			if regex[len(regex)-1] == ')' { // The closing paren would have also been added. Let's remove that.
-				regex = regex[:len(regex)-1]
-			}
 			if len(regex) <= 1 { // Nothing in regex - panic
 				panic("Invalid lookaround. (too short?)")
 			}
@@ -574,13 +571,16 @@ func main() {
 			}
 			// Assuming err != nil
 			if err == io.EOF {
+				if len(temp) > 0 {
+					test_str += temp // Add the last line (if it is non-empty)
+				}
 				linesRead = true
 			} else {
 				panic(err)
 			}
 		}
 		test_runes = []rune(test_str)
-		matchIndices := findAllMatches(startState, []rune(test_runes))
+		matchIndices := findAllMatches(startState, test_runes)
 		if *printMatchesFlag {
 			for _, idx := range matchIndices {
 				fmt.Printf("%s\n", idx.toString())