prelude.rb: Add Kernel#pp, a trigger for lib/pp.rb

[Feature #14123]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60944 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

NEWS

@@ -76,6 +76,7 @@ with all sufficient information, see the ChangeLog file or Redmine
 * Kernel
 
   * Kernel#yield_self  [Feature #6721]
+  * Kernel#pp [Feature #14123]
 
 * Module
   * Module#attr, attr_accessor, attr_reader, attr_writer are now public [#14132]

lib/pp.rb

@@ -17,6 +17,7 @@ module Kernel
   # prints arguments in pretty form.
   #
   # pp returns argument(s).
+  undef pp if method_defined?(:pp)
   def pp(*objs)
     objs.each {|obj|
       PP.pp(obj)

prelude.rb

@@ -141,3 +141,13 @@ class Binding
     irb
   end
 end
+
+module Kernel
+  # prints arguments in pretty form.
+  #
+  # pp returns argument(s).
+  def pp(*objs)
+    require 'pp'
+    pp(objs)
+  end
+end