SI-7003 Partest redirects stderr to log file

Some scalac output is on stderr, and it's useful to see that
in the log file, especially for debugging.

Adds a line filter for logs, specified as "filter: pattern"
in the test source.

Backslashes are made forward only when detected as paths.

Test alignments:

Deprecations which do not pertain to the system under test
are corrected in the obvious way.

When testing deprecated API, suppress warnings by deprecating
the Test object.

Check files are updated with useful true warnings, instead of
running under -nowarn.

Language feature imports as required, instead of running under -language.

Language feature not required, such as casual use of postfix.

Heed useful warning.

Ignore broken warnings. (Rarely, -nowarn.)

Inliner warnings pop up under -optimise only, so for now, just
filter them out where they occur.

Debug output from the test required an update.

Author: som-snytt

test/files/jvm/t560bis.scala

@@ -6,7 +6,7 @@ import scala.xml._;
     case _ => Console.println("bah")
   }
   def foo(args: List[String]) = 
-    Elem(null,"bla",Null, TopScope, (args map {x => Text(x)}):_*) match {
+    Elem(null,"bla",Null, TopScope, minimizeEmpty = true, (args map {x => Text(x)}):_*) match {
       case Elem(_,_,_,_,Text("1"),_*) =>
         Console.println("cool!")
       case _ =>

test/files/jvm/xml01.scala

@@ -4,6 +4,8 @@ import org.xml.sax.InputSource
 import scala.xml._
 
 object Test extends App {
+  def Elem(prefix: String, label: String, attributes: MetaData, scope: NamespaceBinding, child: Node*): Elem =
+    scala.xml.Elem.apply(prefix, label, attributes, scope, minimizeEmpty = true, child: _*)
   val e:  scala.xml.MetaData         = Null  //Node.NoAttributes
   val sc: scala.xml.NamespaceBinding = TopScope
 

test/files/jvm/xml03syntax.check

@@ -24,3 +24,4 @@ true
 
 node=<elem key="<b>hello</b>"/>, key=Some(<b>hello</b>)
 node=<elem/>, key=None
+<a>Š</a>

test/files/jvm/xml03syntax.scala

@@ -91,7 +91,7 @@ object Test {
     }
     val parsed = parser.element(TopScope) // parse the source as element
     // alternatively, we could call document()
-    parsed
+    println(parsed)
   }
 
 }

test/files/run/io-position.scala

@@ -1,7 +1,5 @@
 object Test {
-  Console.setErr(Console.out)
-  
-  def main(args: Array[String]): Unit = { 
+  def main(args: Array[String]): Unit = Console.withErr(Console.out) { 
     try {
       xml.parsing.ConstructingParser.fromSource(io.Source.fromString("<foo>"), false).document()
     } catch {

test/files/run/repl-backticks.scala

@@ -8,7 +8,7 @@ object Test {
     `yield`  
   </code>.text
 
-  def main(args: Array[String]) = {
+  def main(args: Array[String]) {
     val settings = new Settings()
     settings.classpath.value = System.getProperty("java.class.path")
     val repl = new interpreter.IMain(settings)

test/files/run/t1500.scala

@@ -16,7 +16,7 @@ object Test {
 
   </code>.text
 
-  def main(args: Array[String]) = {
+  def main(args: Array[String]) {
 
     val settings = new Settings()
     settings.classpath.value = System.getProperty("java.class.path")

test/files/run/t1501.scala

@@ -27,7 +27,7 @@ object Test {
 
   </code>.text
 
-  def main(args: Array[String]) = {
+  def main(args: Array[String]) {
     val settings = new Settings()
     settings.classpath.value = System.getProperty("java.class.path")
     val tool = new interpreter.IMain(settings)

test/files/run/t3705.scala

@@ -2,16 +2,16 @@
 
 import scala.xml._
 object Test {
+  // guard caused verifyerror in oldpatmat
   def updateNodes(ns: Seq[Node]): Seq[Node] =
     for(subnode <- ns) yield subnode match {
       case <d>{_}</d> if true => <d>abc</d>
       case Elem(prefix, label, attribs, scope, children @ _*) =>
-        Elem(prefix, label, attribs, scope, updateNodes(children) : _*)
+        Elem(prefix, label, attribs, scope, minimizeEmpty = true, updateNodes(children) : _*)
       case other => other
     }
   def main(args: Array[String]): Unit = {
     updateNodes(<b />)
-    
   }
 }
 

test/files/run/xml-loop-bug.scala

@@ -1,8 +1,14 @@
+import java.io.{ Console => _, _ }
+import scala.io._
+import scala.xml.parsing._
 object Test {
   def main(args: Array[String]): Unit = {
-    val sink = new java.io.PrintStream(new java.io.ByteArrayOutputStream())
-    Console setOut sink
-    Console setErr sink
-    scala.xml.parsing.ConstructingParser.fromSource(scala.io.Source.fromString("<!DOCTYPE xmeml SYSTEM> <xmeml> <sequence> </sequence> </xmeml> "), true).document.docElem 
+    val xml = "<!DOCTYPE xmeml SYSTEM> <xmeml> <sequence> </sequence> </xmeml> "
+    val sink = new PrintStream(new ByteArrayOutputStream())
+    (Console withOut sink) {
+      (Console withErr sink) {
+        ConstructingParser.fromSource((Source fromString xml), true).document.docElem 
+      }
+    }
   }
 }