Remove extra blank lines

src/main/java/org/apache/commons/mail/Email.java

@@ -1417,7 +1417,6 @@ else if (this.emailBody != null)
                     this.toInternetAddressArray(this.replyList));
             }
 
-
             if (!this.headers.isEmpty())
             {
                 for (final Map.Entry<String, String> entry : this.headers.entrySet())

src/main/java/org/apache/commons/mail/EmailConstants.java

@@ -240,7 +240,6 @@ public final class EmailConstants
      */
     public static final String MAIL_FROM = "mail.from";
 
-
     /** Hide constructor. */
     private EmailConstants()
     {

src/main/java/org/apache/commons/mail/HtmlEmail.java

@@ -90,7 +90,6 @@ public class HtmlEmail extends MultiPartEmail
     /** suffix for default HTML mail. */
     private static final String HTML_MESSAGE_END = "</pre></body></html>";
 
-
     /**
      * Text part of the message. This will be used as alternative text if
      * the email client does not support HTML messages.

src/test/java/org/apache/commons/mail/EmailTest.java

@@ -691,7 +691,6 @@ public void testAddBcc2() throws Exception
 
         final String[] testEmailNames = {"Name1", "", null};
 
-
         final List<InternetAddress> arrExpected = new ArrayList<>();
         arrExpected.add(new InternetAddress("me@home.com", "Name1"));
         arrExpected.add(new InternetAddress("joe.doe@apache.org"));

src/test/java/org/apache/commons/mail/InvalidInternetAddressTest.java

@@ -97,7 +97,6 @@ public void testStrictConstructor() throws Exception
         // Prove InternetAddress constructor is throwing exception.
         // ====================================================================
 
-
         // test Invalid Email addresses
         for (int i = 0; i < ARR_INVALID_EMAILS.length; i++)
         {

src/test/java/org/apache/commons/mail/util/IDNEmailAddressConverterTest.java

@@ -65,7 +65,6 @@ public void testNonIDNEmailAddressToAsciiConversion()
         assertEquals("me@home.com", idnEmailConverter.toASCII("me@home.com"));
     }
 
-
     @Test
     public void testInternetAddressToAsciiConversion() throws Exception
     {