Better regex testing in TestMaterialWrite

jme3-plugins/src/test/java/com/jme3/material/plugin/TestMaterialWrite.java

@@ -73,7 +73,7 @@ public class TestMaterialWrite {
 //        System.err.println(reference);
 //        System.err.println(stream.toString());
 
-        assertEquals(reference.replaceAll("\\s",""), stream.toString().replaceAll("\\s",""));
+        assertEquals(reference.replaceAll("[\\s|\\r\\n]",""), stream.toString().replaceAll("[\\s|\\r\\n]",""));
     }
 
     private String convertStreamToString(java.io.InputStream is) {