Trim newlines at start/end of lyrics

Collapse more than one empty lines into one

app/src/main/java/com/kabouzeid/gramophone/model/lyrics/AbsSynchronizedLyrics.java

@@ -44,10 +44,10 @@ public abstract class AbsSynchronizedLyrics extends Lyrics {
 
             for (int i = 0; i < lines.size(); i++) {
                 String line = lines.valueAt(i);
-                sb.append(line).append('\n');
+                sb.append(line).append("\r\n");
             }
 
-            return sb.toString();
+            return sb.toString().trim().replaceAll("(\r?\n){3,}", "\r\n\r\n");
         }
 
         return super.getText();

app/src/main/java/com/kabouzeid/gramophone/model/lyrics/Lyrics.java

@@ -59,7 +59,7 @@ public class Lyrics {
     }
 
     public String getText() {
-        return this.data;
+        return this.data.trim().replaceAll("(\r?\n){3,}", "\r\n\r\n");
     }
 
     static {