Enable checkstyle FileTabCharacter

airsonic-main/src/main/java/org/airsonic/player/ajax/LyricsService.java

@@ -63,7 +63,7 @@ public class LyricsService {
      * @return The lyrics, never <code>null</code> .
      */
     public LyricsInfo getLyrics(String artist, String song) {
-    	LyricsInfo lyrics = new LyricsInfo();
+        LyricsInfo lyrics = new LyricsInfo();
         try {
 
             artist = StringUtil.urlEncode(artist);

checkstyle.xml

@@ -10,6 +10,8 @@
 
     <property name="fileExtensions" value="java, properties, xml"/>
 
+    <module name="FileTabCharacter"/>
+
     <module name="TreeWalker">
         <module name="AnnotationLocation"/>
         <module name="CustomImportOrder">