Recursive globbing better mimics standard lib Dir

Patterns ending in wildcards now return files and directories.

lib/fakefs/file_system.rb

@@ -109,11 +109,12 @@ def find_recurser(dir, parts)
       matches = case pattern
       when '**'
         case parts
-        when ['*'], []
+        when ['*']
           parts = [] # end recursion
-          directories_under(dir).map do |d|
-            d.values.select{|f| f.is_a? FakeFile }
-          end.flatten.uniq
+          directories_under(dir).map { |d| d.values }.flatten.uniq
+        when []
+          parts = [] # end recursion
+          dir.values
         else
           directories_under(dir)
         end

test/fakefs_test.rb

@@ -468,12 +468,18 @@ def test_dir_glob_handles_recursive_globs
     assert_equal ['/one/two/three'], Dir['/one/**/three']
   end
 
-  def test_dir_recursive_glob_ending_in_wildcards_only_returns_files
+  def test_dir_recursive_glob_ending_in_wildcards_returns_files_and_directories
     File.open('/one/two/three/four.rb', 'w')
     File.open('/one/five.rb', 'w')
-    assert_equal ['/one/five.rb', '/one/two/three/four.rb'], Dir['/one/**/*']
-    assert_equal ['/one/five.rb', '/one/two/three/four.rb'], Dir['/one/**']
-  end
+
+    expected  = [ '/one/five.rb', '/one/two' ]
+    expected += [ '/one/two/three', '/one/two/three/four.rb' ]
+    assert_equal expected, Dir['/one/**/*']
+
+    expected = ['/one/five.rb', '/one/two']
+    assert_equal expected, Dir['/one/**']
+   end
+
 
   def test_should_report_pos_as_0_when_opening
     File.open("/foo", "w") do |f|