Revert "broken tests -- for check file diffing ease"

This reverts commit 631b636,
at least the part that masked actual breakage

Currently failing tests:

 - test/files/pos/t6780.scala
 - test/files/neg/anytrait.scala
 - test/files/neg/delayed-init-ref.scala
 - test/files/neg/t562.scala
 - test/files/neg/t6276.scala
 - test/files/run/delambdafy_uncurry_byname_inline.scala
 - test/files/run/delambdafy_uncurry_byname_method.scala
 - test/files/run/delambdafy_uncurry_inline.scala
 - test/files/run/delambdafy_uncurry_method.scala
 - test/files/run/inner-obj-auto.scala
 - test/files/run/lazy-traits.scala
 - test/files/run/reify_lazyunit.scala
 - test/files/run/showraw_mods.scala
 - test/files/run/t3670.scala
 - test/files/run/t3980.scala
 - test/files/run/t4047.scala
 - test/files/run/t6622.scala
 - test/files/run/t7406.scala
 - test/files/run/t7843-jsr223-service.scala
 - test/files/jvm/innerClassAttribute
 - test/files/specialized/SI-7343.scala
 - test/files/specialized/constant_lambda.scala
 - test/files/specialized/spec-early.scala
 - test/files/specialized/spec-init.scala
 - test/files/specialized/spec-matrix-new.scala
 - test/files/specialized/spec-matrix-old.scala
 - test/files/presentation/scope-completion-3

Author: adriaanm

test/files/neg/anytrait.check

@@ -1,4 +1,7 @@
+anytrait.scala:3: error: field definition is not allowed in universal trait extending from class Any
+  var x = 1
+      ^
 anytrait.scala:5: error: this statement is not allowed in universal trait extending from class Any
   { x += 1 }
       ^
-one error found
+two errors found

test/files/neg/delayed-init-ref.check

@@ -8,6 +8,9 @@ delayed-init-ref.scala:28: warning: trait DelayedInit in package scala is deprec
 See the release notes for more details: https://github.com/scala/scala/releases/tag/v2.11.0-RC1
 trait Before extends DelayedInit {
                      ^
+delayed-init-ref.scala:40: warning: Selecting value foo from trait UserContext, which extends scala.DelayedInit, is likely to yield an uninitialized value
+    println({locally(()); this}.foo)  // warn (spurious, but we can't discriminate)
+                                ^
 error: No warnings can be incurred under -Xfatal-warnings.
-three warnings found
+four warnings found
 one error found

test/files/neg/t562.check

@@ -1,4 +1,4 @@
-t562.scala:10: error: super may not be used on <none>
+t562.scala:10: error: super may not be used on value y
   override val y = super.y;
                          ^
 one error found

test/files/neg/t6276.check

@@ -1,6 +1,9 @@
 t6276.scala:4: warning: method a in class C does nothing other than call itself recursively
       def a: Any = a // warn
                    ^
+t6276.scala:5: warning: value b in class C does nothing other than call itself recursively
+      val b: Any = b // warn
+                   ^
 t6276.scala:7: warning: method c in class C does nothing other than call itself recursively
       def c: Any = this.c // warn
                         ^
@@ -14,5 +17,5 @@ t6276.scala:22: warning: method a does nothing other than call itself recursivel
       def a = a // warn
               ^
 error: No warnings can be incurred under -Xfatal-warnings.
-5 warnings found
+6 warnings found
 one error found

test/files/run/bugs.check

@@ -91,8 +91,6 @@ C
 >>> bug 396
 
 <<< bug 399
-Exception in thread "Thread[main,5,main]" java.lang.AbstractMethodError: Bug399Test$G$1.Bug399Test$C$1$_setter_$x$1_$eq(Ljava/lang/String;)V
+a
 >>> bug 399
 
-
-1 error