SI-8253 Fix incorrect parsing of <elem xmlns={f("a")}/>

The spliced application was placed in the `attrMap` in
`SymbolicXMLBuilder` and later incorrectly matched by a pattern
intended only to match:

    xml.Text(s)

That attribute value is generated by parsing:

   <elem xmlns='a'/>

So the net effect was that the two fragments of XML were identical!

This commit sharpens up the match to really look for a syntactic
`_root_.scala.xml.Text("...")`.

The test just prints the parse trees of a variety of cases, as we
we should not test the modularized XML library in scala/scala.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/reflect/scala/reflect/internal/StdNames.scala b/src/reflect/scala/reflect/internal/StdNames.scala
index f2517fff54..667ff7c4b4 100644
--- a/src/reflect/scala/reflect/internal/StdNames.scala
+++ b/src/reflect/scala/reflect/internal/StdNames.scala
@@ -248,6 +248,7 @@ trait StdNames {
     final val Unliftable: NameType          = "Unliftable"
     final val Name: NameType                = "Name"
     final val Tree: NameType                = "Tree"
+    final val Text: NameType                = "Text"
     final val TermName: NameType            = "TermName"
     final val Type : NameType               = "Type"
     final val TypeName: NameType            = "TypeName"
@@ -778,6 +779,7 @@ trait StdNames {
     val values : NameType              = "values"
     val wait_ : NameType               = "wait"
     val withFilter: NameType           = "withFilter"
+    val xml: NameType                  = "xml"
     val zero: NameType                 = "zero"
 
     // quasiquote interpolators: