Maintenance of Predef.

1) Deprecates much of Predef and scala.Console, especially:

 - the read* methods (see below)
 - the set{Out,Err,In} methods (see SI-4793)

2) Removed long-deprecated:

 - Predef#exit
 - Predef#error should have gone, but could not due to sbt

At least the whole source base has now been future-proofed
against the eventual removal of Predef#error.

The low justification for the read* methods should be readily
apparent: they are little used and have no call to be in global
namespace, especially given their weird ad hoc semantics and
unreasonably tempting names such as readBoolean().

3) Segregated the deprecated elements in Predef from the part
which still thrives.

4) Converted all the standard Predef implicits into implicit
classes, value classes where possible:

  - ArrowAssoc, Ensuring, StringFormat, StringAdd, RichException (value)
  - SeqCharSequence, ArrayCharSequence (non-value)

Non-implicit deprecated stubs prop up the names of the
formerly converting methods.

1 files changed, 7 insertions, 7 deletions

diff --git a/test/files/pos/typealias_dubious.scala b/test/files/pos/typealias_dubious.scala
index 587453a037..cdba1a64d0 100644
--- a/test/files/pos/typealias_dubious.scala
+++ b/test/files/pos/typealias_dubious.scala
@@ -1,15 +1,15 @@
 class MailBox {
-  //class Message 
+  //class Message
   type Message = AnyRef
-}   
-   
+}
+
 abstract class Actor {
   private val in = new MailBox
 
-  def send(msg: in.Message) =  error("foo")
+  def send(msg: in.Message) =  sys.error("foo")
 
-  def unstable: Actor = error("foo")
+  def unstable: Actor = sys.error("foo")
 
-  def dubiousSend(msg: MailBox#Message) = 
+  def dubiousSend(msg: MailBox#Message) =
     unstable.send(msg) // in.Message becomes unstable.Message, but that's ok since Message is a concrete type member
-}      
+}