Improve U.formatXml(string, COMPACT).

Author: javadev

src/main/java/com/github/underscore/lodash/Xml.java

@@ -115,7 +115,7 @@ public String toString() {
     public static class XmlStringBuilderWithoutRoot extends XmlStringBuilder {
         public XmlStringBuilderWithoutRoot(XmlStringBuilder.Step identStep, String encoding) {
             super(new StringBuilder("<?xml version=\"1.0\" encoding=\""
-                + U.escape(encoding) + "\"?>\n"), identStep, 0);
+                + U.escape(encoding) + "\"?>" + (identStep == Step.COMPACT ? "" : "\n")), identStep, 0);
         }
 
         public String toString() {

src/test/java/com/github/underscore/lodash/LodashTest.java

@@ -597,7 +597,7 @@ public void formatXml() {
             U.formatXml("<a>\n  <b>\n  </b>\n  <b>\n  </b>\n</a>"));
         assertEquals("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<a>\n    <b></b>\n    <b></b>\n</a>",
             U.formatXml("<a>\n  <b>\n  </b>\n  <b>\n  </b>\n</a>", Xml.XmlStringBuilder.Step.FOUR_SPACES));
-        assertEquals("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<a><b></b><b></b></a>",
+        assertEquals("<?xml version=\"1.0\" encoding=\"UTF-8\"?><a><b></b><b></b></a>",
             U.formatXml("<a>\n  <b>\n  </b>\n  <b>\n  </b>\n</a>", Xml.XmlStringBuilder.Step.COMPACT));
         assertEquals("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<a>\n\t<b></b>\n\t<b></b>\n</a>",
             U.formatXml("<a>\n  <b>\n  </b>\n  <b>\n  </b>\n</a>", Xml.XmlStringBuilder.Step.TABS));