Adjust the format for better readability (PHPMailer#1687)

Adjust the format for better readability

README.md

@@ -89,20 +89,22 @@ While installing the entire package manually or with Composer is simple, conveni
 use PHPMailer\PHPMailer\PHPMailer;
 use PHPMailer\PHPMailer\Exception;
 
-//Load Composer's autoloader
+// Load Composer's autoloader
 require 'vendor/autoload.php';
 
-$mail = new PHPMailer(true);                              // Passing `true` enables exceptions
+// Instantiation and passing `true` enables exceptions
+$mail = new PHPMailer(true);
+
 try {
     //Server settings
-    $mail->SMTPDebug = 2;                                 // Enable verbose debug output
-    $mail->isSMTP();                                      // Set mailer to use SMTP
-    $mail->Host = 'smtp1.example.com;smtp2.example.com';  // Specify main and backup SMTP servers
-    $mail->SMTPAuth = true;                               // Enable SMTP authentication
-    $mail->Username = 'user@example.com';                 // SMTP username
-    $mail->Password = 'secret';                           // SMTP password
-    $mail->SMTPSecure = 'tls';                            // Enable TLS encryption, `ssl` also accepted
-    $mail->Port = 587;                                    // TCP port to connect to
+    $mail->SMTPDebug = 2;                                       // Enable verbose debug output
+    $mail->isSMTP();                                            // Set mailer to use SMTP
+    $mail->Host       = 'smtp1.example.com;smtp2.example.com';  // Specify main and backup SMTP servers
+    $mail->SMTPAuth   = true;                                   // Enable SMTP authentication
+    $mail->Username   = 'user@example.com';                     // SMTP username
+    $mail->Password   = 'secret';                               // SMTP password
+    $mail->SMTPSecure = 'tls';                                  // Enable TLS encryption, `ssl` also accepted
+    $mail->Port       = 587;                                    // TCP port to connect to
 
     //Recipients
     $mail->setFrom('from@example.com', 'Mailer');
@@ -112,11 +114,11 @@ try {
     $mail->addCC('cc@example.com');
     $mail->addBCC('bcc@example.com');
 
-    //Attachments
+    // Attachments
     $mail->addAttachment('/var/tmp/file.tar.gz');         // Add attachments
     $mail->addAttachment('/tmp/image.jpg', 'new.jpg');    // Optional name
 
-    //Content
+    // Content
     $mail->isHTML(true);                                  // Set email format to HTML
     $mail->Subject = 'Here is the subject';
     $mail->Body    = 'This is the HTML message body <b>in bold!</b>';
@@ -125,7 +127,7 @@ try {
     $mail->send();
     echo 'Message has been sent';
 } catch (Exception $e) {
-    echo 'Message could not be sent. Mailer Error: ', $mail->ErrorInfo;
+    echo "Message could not be sent. Mailer Error: {$mail->ErrorInfo}";
 }
 ```