Set default node status to '??'

Author: wteuber

lib/node.rb

@@ -26,7 +26,7 @@ def initialize(name, children = nil, status = nil)
 
     @name = name
     @children = children
-    @status = status || []
+    @status = status || '??'
   end
 
   def self.create_from_string(gs_porcelain)

src/git-status-tree.rb

@@ -13,4 +13,4 @@
 #   'R'  renamed
 #   'C'  copied
 #   'U'  updated but unmerged
-#   '??' new
+#   '??' other

test/node/test_node_attributes.rb

@@ -6,6 +6,10 @@ def test_node_name_file
     assert_equal('file.txt', Node.new('file.txt').name)
   end
 
+  def test_node_status_default
+    assert_equal('??', Node.new('file.txt').status)
+  end
+
   def test_node_name_dir
     assert_equal('dir_name', Node.new('dir_name', NodesCollection.new).name)
   end