Rename files

data_structures/linked_lists/doubly_linked_list.rb

@@ -1,5 +1,5 @@
 class DoublyLinkedList
-  # Initialize your data structure here.
+  # Initialize the data structure here.
   attr_reader :head, :tail, :size
 
   def initialize
@@ -84,7 +84,6 @@ class DoublyLinkedList
           cnt -= 1
         end
       end
-      # else put "illegal input"
     end
   end
 
@@ -126,7 +125,6 @@ class DoublyLinkedList
           cnt -= 1
         end
       end
-      # else put "illegal input"
     end
   end
 

data_structures/linked_lists/singly_linked_list.rb

@@ -1,5 +1,6 @@
 # Define a node in the list
 class Node
+  # Initialize the data structure here.
   attr_accessor :value, :next
 
   def initialize(value)
@@ -9,7 +10,6 @@ class Node
 end
 
 # A Class for single linked lists (each element links to the next one, but not to the previous one)
-
 class SinglyLinkedList
   include Enumerable
   attr_accessor :head