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, 3 deletions

diff --git a/test/files/pos/channels.scala b/test/files/pos/channels.scala
index 0a2274c47a..b2f0cdc321 100644
--- a/test/files/pos/channels.scala
+++ b/test/files/pos/channels.scala
@@ -6,7 +6,7 @@ case class ![a](chan: Channel[a], data: a)
 
 /*
 object Bang {
-  def unapply[a](x: ![a]): Option[{Channel[a], a}] = 
+  def unapply[a](x: ![a]): Option[{Channel[a], a}] =
     Some(x.chan, x.data)
 }
 
@@ -14,7 +14,7 @@ object Bang {
 object Test extends App {
   object IC extends Channel[Int]
   def f[b](x: ![b]): Int = x match {
-    case send: ![c] => 
+    case send: ![c] =>
       send.chan match {
         case IC => send.data
       }
@@ -27,4 +27,3 @@ object Test2 extends App {
     case IC ! x => x
   }
 }
-