Cull extraneous whitespace.

One last flurry with the broom before I leave you slobs to code
in your own filth. Eliminated all the trailing whitespace I
could manage, with special prejudice reserved for the test cases
which depended on the preservation of trailing whitespace.

Was reminded I cannot figure out how to eliminate the trailing
space on the "scala> " prompt in repl transcripts. At least
reduced the number of such empty prompts by trimming transcript
code on the way in.

Routed ConsoleReporter's "printMessage" through a trailing
whitespace stripping method which might help futureproof
against the future of whitespace diseases. Deleted the up-to-40
lines of trailing whitespace found in various library files.

It seems like only yesterday we performed whitespace surgery
on the whole repo. Clearly it doesn't stick very well. I suggest
it would work better to enforce a few requirements on the way in.

1 files changed, 2 insertions, 2 deletions

diff --git a/test/files/run/t3970.scala b/test/files/run/t3970.scala
index f8c763bc85..35b5ce6e1b 100644
--- a/test/files/run/t3970.scala
+++ b/test/files/run/t3970.scala
@@ -9,11 +9,11 @@ object Test {
   def main(args: Array[String]) {
     val dl = DoubleLinkedList[Int]()
     dl.remove()
-    
+
     val dl2 = DoubleLinkedList[Int](1, 2, 3)
     dl2.next.remove()
     assert(dl2 == DoubleLinkedList(1, 3))
-    
+
     val dl3 = DoubleLinkedList[Int](1, 2, 3)
     assert(dl3.drop(1) == DoubleLinkedList(2, 3))
     assert(dl3.drop(1).prev == null)