Use Pry::Output to strip color when necessary

All credit to johnny5- for this idea:
952568b933

Pros: No longer need to check _pry_.config.color everywhere.
      All color is stripped (not just that added by pry)

Cons: Inefficient to add colors and then remove them again.

lib/pry.rb

@@ -170,3 +170,4 @@ require "pry/last_exception"
 require "pry/prompt"
 require "pry/inspector"
 require 'pry/object_path'
+require 'pry/output'

lib/pry/helpers/text.rb

@@ -21,11 +21,11 @@ class Pry
 
         COLORS.each_pair do |color, value|
           define_method color do |text|
-            Pry.config.color ? "\033[0;#{30+value}m#{text}\033[0m" : text.to_s
+            "\033[0;#{30+value}m#{text}\033[0m"
           end
 
           define_method "bright_#{color}" do |text|
-            Pry.config.color ? "\033[1;#{30+value}m#{text}\033[0m" : text.to_s
+            "\033[1;#{30+value}m#{text}\033[0m"
           end
         end
 
@@ -38,12 +38,11 @@ class Pry
         end
 
         # Returns _text_ as bold text for use on a terminal.
-        # _Pry.config.color_ must be true for this method to perform any transformations.
         #
         # @param [String, #to_s] text
         # @return [String] _text_
         def bold(text)
-          Pry.config.color ? "\e[1m#{text}\e[0m" : text.to_s
+          "\e[1m#{text}\e[0m"
         end
 
         # Returns `text` in the default foreground colour.

lib/pry/output.rb

@@ -0,0 +1,31 @@
+
+class Pry
+  class Output
+    attr_reader :_pry_
+    def initialize(_pry_)
+      @_pry_ = _pry_
+    end
+
+    def puts(str)
+      print "#{str.chomp}\n"
+    end
+
+    def print str
+      if _pry_.config.color
+        _pry_.config.output.print str
+      else
+        _pry_.config.output.print Helpers::Text.strip_color str
+      end
+    end
+    alias << print
+    alias write print
+
+    def method_missing(name, *args, &block)
+      _pry_.config.output.send(name, *args, &block)
+    end
+
+    def respond_to_missing?(*a)
+      _pry_.config.respond_to?(*a)
+    end
+  end
+end

lib/pry/pager.rb

@@ -50,11 +50,11 @@ class Pry::Pager
   # @param [#<<] output ($stdout) An object to send output to.
   def best_available
     if !_pry_.config.pager
-      NullPager.new(_pry_.config.output)
+      NullPager.new(_pry_.output)
     elsif !SystemPager.available? || Pry::Helpers::BaseHelpers.jruby?
-      SimplePager.new(_pry_.config.output)
+      SimplePager.new(_pry_.output)
     else
-      SystemPager.new(_pry_.config.output)
+      SystemPager.new(_pry_.output)
     end
   end
 
@@ -107,7 +107,7 @@ class Pry::Pager
 
         if @tracker.page?
           @out.print "\n"
-          @out.print "\e[0m" if Pry.config.color
+          @out.print "\e[0m"
           @out.print "<page break> --- Press enter to continue " \
                      "( q<enter> to break ) --- <page break>\n"
           raise StopPaging if Readline.readline("").chomp == "q"

lib/pry/pry_instance.rb

@@ -603,6 +603,13 @@ class Pry
     Pry::Pager.new(self)
   end
 
+  # Returns an output device
+  # @example
+  #   _pry_.output.puts "ohai!"
+  def output
+    Pry::Output.new(self)
+  end
+
   # Raise an exception out of Pry.
   #
   # See Kernel#raise for documentation of parameters.