add Pry::Config::Behavior.

a Module Pry::Config and Pry::Config::Default can use to share common
behavior. before now ::Default was a subclass of Pry::Config but are
class methods(such as Pry::Config.from_hash()) that do not make sense
on Pry::Config::Default.

lib/pry/config.rb

@@ -1,8 +1,9 @@
 class Pry::Config
   require 'ostruct'
+  require 'pry/config/behavior'
   require 'pry/config/default'
   require 'pry/config/convenience'
-  ASSIGNMENT = "=".freeze
+  include Pry::Config::Behavior
 
   def self.shortcuts
     Convenience::SHORTCUTS
@@ -14,56 +15,6 @@ class Pry::Config
     end
   end
 
-  def initialize(default = Pry.config)
-    @default = default
-    @lookup = {}
-  end
-
-  def [](key)
-    @lookup[key.to_s]
-  end
-
-  def []=(key, value)
-    @lookup[key.to_s] = value
-  end
-
-  def method_missing(name, *args, &block)
-    key = name.to_s
-    if key[-1] == ASSIGNMENT
-      short_key = key[0..-2]
-      self[short_key] = args[0]
-    elsif @lookup.has_key?(key)
-      self[key]
-    elsif @default.respond_to?(name)
-      @default.public_send(name, *args, &block)
-    else
-      nil
-    end
-  end
-
-  def merge!(other)
-    raise TypeError, "cannot coerce argument to Hash" unless other.respond_to?(:to_hash)
-    other = other.to_hash
-    keys, values = other.keys.map(&:to_s), other.values
-    @lookup.merge! Hash[keys.zip(values)]
-  end
-
-  def respond_to?(name, boolean=false)
-    @lookup.has_key?(name.to_s) or @default.respond_to?(name) or super(name, boolean)
-  end
-
-  def refresh
-    @lookup = {}
-  end
-
-  def to_hash
-    @lookup
-  end
-
-  def to_h
-    @lookup
-  end
-
   #
   # FIXME
   # @param [Pry::Hooks] hooks
@@ -77,8 +28,4 @@ class Pry::Config
       self["hooks"] = hooks
     end
   end
-
-  def quiet?
-    quiet
-  end
 end

lib/pry/config/behavior.rb

@@ -0,0 +1,57 @@
+module Pry::Config::Behavior
+  ASSIGNMENT = "=".freeze
+
+  def initialize(default = Pry.config)
+    @default = default
+    @lookup = {}
+  end
+
+  def [](key)
+    @lookup[key.to_s]
+  end
+
+  def []=(key, value)
+    @lookup[key.to_s] = value
+  end
+
+  def method_missing(name, *args, &block)
+    key = name.to_s
+    if key[-1] == ASSIGNMENT
+      short_key = key[0..-2]
+      self[short_key] = args[0]
+    elsif @lookup.has_key?(key)
+      self[key]
+    elsif @default.respond_to?(name)
+      @default.public_send(name, *args, &block)
+    else
+      nil
+    end
+  end
+
+  def merge!(other)
+    raise TypeError, "cannot coerce argument to Hash" unless other.respond_to?(:to_hash)
+    other = other.to_hash
+    keys, values = other.keys.map(&:to_s), other.values
+    @lookup.merge! Hash[keys.zip(values)]
+  end
+
+  def respond_to?(name, boolean=false)
+    @lookup.has_key?(name.to_s) or @default.respond_to?(name) or super(name, boolean)
+  end
+
+  def refresh
+    @lookup = {}
+  end
+
+  def to_hash
+    @lookup
+  end
+
+  def to_h
+    @lookup
+  end
+
+  def quiet?
+    quiet
+  end
+end

lib/pry/config/default.rb

@@ -1,4 +1,6 @@
-class Pry::Config::Default < Pry::Config
+class Pry::Config::Default
+  include Pry::Config::Behavior
+
   default = {
     :input                  => proc { Readline },
     :output                 => proc { $stdout },