Preserve attribute order in inline XML

Author: khernyo

test/files/run/xml-attribute.check

@@ -0,0 +1,12 @@
+<t></t>
+<t></t>
+<t></t>
+<t></t>
+<t></t>
+<t b="1" d="2"></t>
+<t b="1" d="2"></t>
+<t b="1" d="2"></t>
+<t a="1" d="2"></t>
+<t b="1" d="2"></t>
+<t a="1" b="2" c="3"></t>
+<t g="1" e="2" p:a="3" f:e="4" mgruhu:ji="5"></t>

test/files/run/xml-attribute.scala

@@ -12,22 +12,26 @@ object Test {
     assert(noAttr == preAttrNull)
     assert(noAttr == preAttrNone)
 
-    val noAttrStr = "<t></t>"
-    assert(noAttr.toString() == noAttrStr)
-    assert(attrNull.toString() == noAttrStr)
-    assert(attrNone.toString() == noAttrStr)
-    assert(preAttrNull.toString() == noAttrStr)
-    assert(preAttrNone.toString() == noAttrStr)
+    println(noAttr)
+    println(attrNull)
+    println(attrNone)
+    println(preAttrNull)
+    println(preAttrNone)
 
     val xml1 = <t b="1" d="2"/>
     val xml2 = <t a={ null: String } p:a={ null: String } b="1" c={ null: String } d="2"/>
     val xml3 = <t b="1" c={ null: String } d="2" a={ null: String } p:a={ null: String }/>
     assert(xml1 == xml2)
     assert(xml1 == xml3)
 
-    val xml1Str = "<t d=\"2\" b=\"1\"></t>"
-    assert(xml1.toString() == xml1Str)
-    assert(xml2.toString() == xml1Str)
-    assert(xml3.toString() == xml1Str)
+    println(xml1)
+    println(xml2)
+    println(xml3)
+
+    // Check if attribute order is retained
+    println(<t a="1" d="2"/>)
+    println(<t b="1" d="2"/>)
+    println(<t a="1" b="2" c="3"/>)
+    println(<t g="1" e="2" p:a="3" f:e="4" mgruhu:ji="5"/>)
   }
 }