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, 4 insertions, 4 deletions

diff --git a/test/files/run/t4894.scala b/test/files/run/t4894.scala
index aa3b4340af..2b70da141d 100644
--- a/test/files/run/t4894.scala
+++ b/test/files/run/t4894.scala
@@ -4,24 +4,24 @@
 
 
 object Test {
-  
+
   def main(args: Array[String]) {
     import collection._
     val hs = mutable.HashSet[Int]()
     hs ++= 1 to 10
     hs --= 1 to 10
-    
+
     val phs = parallel.mutable.ParHashSet[Int]()
     phs ++= 1 to 10
     for (i <- 1 to 10) assert(phs(i))
     phs --= 1 to 10
     assert(phs.isEmpty)
-    
+
     val phm = parallel.mutable.ParHashMap[Int, Int]()
     phm ++= ((1 to 10) zip (1 to 10))
     for (i <- 1 to 10) assert(phm(i) == i)
     phm --= 1 to 10
     assert(phm.isEmpty)
   }
-  
+
 }