Do not harcode other compile -pagewidth

Author: nicolasstucki

compiler/test/dotty/tools/vulpix/ParallelTesting.scala

@@ -549,7 +549,7 @@ trait ParallelTesting extends RunnerOrchestration { self =>
           else o
         }.mkString(JFile.pathSeparator)
 
-      val pageWidth = 80
+      val pageWidth = TestConfiguration.pageWidth - 20
       val flags1 = flags.copy(defaultClassPath = substituteClasspath(flags.defaultClassPath))
         .withClasspath(targetDir.getPath)
         .and("-d", targetDir.getPath)

compiler/test/dotty/tools/vulpix/TestConfiguration.scala

@@ -6,8 +6,10 @@ import java.io.File
 
 object TestConfiguration {
 
+  val pageWidth = 120
+
   val noCheckOptions = Array(
-    "-pagewidth", "120",
+    "-pagewidth", pageWidth.toString,
     "-color:never",
     "-Xtarget", defaultTarget
   )