MethodUtilsTest whitespaces

Clean up MethodUtilsTest whitespaces as per the project's standards -
no trailing whitespaces are allowed and spaces are used for
indentation.

src/test/java/org/apache/commons/lang3/reflect/MethodUtilsTest.java

@@ -110,32 +110,32 @@ private void privateStuff() {
 
         @SuppressWarnings("unused")
         private String privateStringStuff() {
-        	return "privateStringStuff()";
+            return "privateStringStuff()";
         }
 
         @SuppressWarnings("unused")
         private String privateStringStuff(final int i) {
-        	return "privateStringStuff(int)";
+            return "privateStringStuff(int)";
         }
 
         @SuppressWarnings("unused")
         private String privateStringStuff(final Integer i) {
-        	return "privateStringStuff(Integer)";
+            return "privateStringStuff(Integer)";
         }
 
         @SuppressWarnings("unused")
         private String privateStringStuff(final double d) {
-        	return "privateStringStuff(double)";
+            return "privateStringStuff(double)";
         }
 
         @SuppressWarnings("unused")
         private String privateStringStuff(final String s) {
-        	return "privateStringStuff(String)";
+            return "privateStringStuff(String)";
         }
 
         @SuppressWarnings("unused")
         private String privateStringStuff(final Object s) {
-        	return "privateStringStuff(Object)";
+            return "privateStringStuff(Object)";
         }