html formatter: don't force wrap before first top-level tag (may be root block in injection where wrap is not needed)

Fixes WEB-25814

GitOrigin-RevId: 28f2cfad7d2d8e852cde25f30ff7c58d81c00ed1

xml/impl/src/com/intellij/psi/formatter/xml/AbstractXmlBlock.java

@@ -152,6 +152,9 @@ public abstract class AbstractXmlBlock extends AbstractBlock {
   }
 
   protected Wrap createTagBeginWrapping(final XmlTag tag) {
+    if (!(tag.getParent() instanceof XmlTag) && FormatterUtil.getPreviousNonWhitespaceSibling(tag.getNode()) == null) {
+      return null;
+    }
     return Wrap.createWrap(myXmlFormattingPolicy.getWrappingTypeForTagBegin(tag), true);
   }