refactor Pry::Output and add #tty? method to it.

lib/pry/output.rb

@@ -1,50 +1,50 @@
-class Pry
-  class Output
-    attr_reader :_pry_
+class Pry::Output
+  attr_reader :_pry_
 
-    def initialize(_pry_)
-      @_pry_ = _pry_
-    end
+  def initialize(_pry_)
+    @_pry_ = _pry_
+    @boxed_io = _pry_.config.output
+  end
 
-    def puts(*objs)
-      return print "\n" if objs.empty?
-
-      objs.each do |obj|
-        if ary = Array.try_convert(obj)
-          puts(*ary)
-        else
-          print "#{obj.to_s.chomp}\n"
-        end
-      end
-
-      nil
-    end
-
-    def print(*objs)
-      objs.each do |obj|
-        _pry_.config.output.print decolorize_maybe(obj.to_s)
-      end
-
-      nil
-    end
-    alias << print
-    alias write print
-
-    # If _pry_.config.color is currently false, removes ansi escapes from the string.
-    def decolorize_maybe(str)
-      if _pry_.config.color
-        str
+  def puts(*objs)
+    return print "\n" if objs.empty?
+    objs.each do |obj|
+      if ary = Array.try_convert(obj)
+        puts(*ary)
       else
-        Helpers::Text.strip_color str
+        print "#{obj.to_s.chomp}\n"
       end
     end
+    nil
+  end
 
-    def method_missing(name, *args, &block)
-      _pry_.config.output.__send__(name, *args, &block)
+  def print(*objs)
+    objs.each do |obj|
+      @boxed_io.print decolorize_maybe(obj.to_s)
     end
+    nil
+  end
+  alias << print
+  alias write print
 
-    def respond_to_missing?(*a)
-      _pry_.config.respond_to?(*a)
+  def tty?
+    @boxed_io.respond_to?(:tty?) and @boxed_io.tty?
+  end
+
+  def method_missing(name, *args, &block)
+    @boxed_io.__send__(name, *args, &block)
+  end
+
+  def respond_to_missing?(*a)
+    _pry_.config.respond_to?(*a)
+  end
+
+  private
+  def decolorize_maybe(str)
+    if _pry_.config.color
+      str
+    else
+      Pry::Helpers::Text.strip_color str
     end
   end
 end