Problem with stray '\222' and stray '\221'

I'm still new to this software. How do I fix stray problem? There is stray '\222' and stray '\221'.

int in1 = 13;
int in2 = 12;
int in3 = 11;
int in4 = 10;
int ena = 6;
int enb = 5;
char data = 0;

void setup() {
pinMode(in1,OUTPUT);
pinMode(in2,OUTPUT);
pinMode(in3,OUTPUT);
pinMode(in4,OUTPUT);
pinMode(ena,OUTPUT);
pinMode(enb,OUTPUT);
Serial.begin(9600);
}

void loop() {

if (Serial.available()>0){
data = Serial.read();
if(data == ‘1’){
forward();
}
if(data == ‘2’){
reverse();
}
if(data == ‘3’){
left();
}
if(data == ‘4’){
right();
}
else{
stopp();
}
}

}

void forward(){
digitalWrite(in1, HIGH);
digitalWrite(in2, LOW);
digitalWrite(in3, LOW);
digitalWrite(in4, HIGH);
analogWrite(ena,150); // the speed of left motor
analogWrite(enb,150); // the speed of right motor
delay(20);
}
void reverse(){
digitalWrite(in1, LOW);
digitalWrite(in2, HIGH);
digitalWrite(in3, HIGH);
digitalWrite(in4, LOW);
analogWrite(ena,150);
analogWrite(enb,150);
delay(20);
}

void left(){
digitalWrite(in1, LOW);
digitalWrite(in2, HIGH);
digitalWrite(in3, LOW);
digitalWrite(in4, HIGH);
analogWrite(ena,150);
analogWrite(enb,150);
delay(20);
}

void right(){
digitalWrite(in1, HIGH);
digitalWrite(in2, LOW);
digitalWrite(in3, HIGH);
digitalWrite(in4, LOW);
analogWrite(ena,150);
analogWrite(enb,150);
delay(20);
}
void stopp(){
digitalWrite(in1, LOW);
digitalWrite(in2, LOW);
digitalWrite(in3, LOW);
digitalWrite(in4, LOW);
analogWrite(ena,150);
analogWrite(enb,150);
delay(20);
}

Highlight your code above, copy it into the IDE, and re-compile.
The stray character should get deleted. It compiled ok for me that way.

Thanks. Its work. :smiley: