added a flag to sort hash keys

.gitignore

@@ -19,3 +19,4 @@ rdoc
 pkg
 
 ## PROJECT::SPECIFIC
+.rvmrc

lib/ap/awesome_print.rb

@@ -75,7 +75,8 @@ class AwesomePrint
   def awesome_hash(h)
     return "{}" if h == {}
 
-    data = h.keys.map do |key|
+    keys = @options[:sorted_hash_keys] ? h.keys.sort { |a, b| a.to_s <=> b.to_s } : h.keys
+    data = keys.map do |key|
       plain_single_line do
         [ awesome(key), h[key] ]
       end

spec/awesome_print_spec.rb

@@ -263,6 +263,36 @@ EOS
     end
   end
 
+  #------------------------------------------------------------------------------
+  describe "Hash with several keys" do
+    before(:each) do
+      @hash = {"b" => "b", :a => "a", :z => "z", "alpha" => "alpha"}
+    end
+
+    it "plain multiline" do
+      @hash.ai(:plain => true).should == <<-EOS.strip
+{
+        "b" => "b",
+         :a => "a",
+         :z => "z",
+    "alpha" => "alpha"
+}
+EOS
+    end
+    
+    it "plain multiline with sorted keys" do
+      @hash.ai(:plain => true, :sorted_hash_keys => true).should == <<-EOS.strip
+{
+         :a => "a",
+    "alpha" => "alpha",
+        "b" => "b",
+         :z => "z"
+}
+EOS
+    end
+
+  end
+
   #------------------------------------------------------------------------------
   describe "Negative options[:indent]" do
     before(:each) do