docs: def merge(self, n):
          """Merge new file into old
          """
          if os.path.isfile(n[:-4]):
              old = Utils().read_file(n[:-4]).splitlines()
          if os.path.isfile(n):
              new = Utils().read_file(n).splitlines()
          with open(n[:-4], "w") as out:
              for l1, l2 in itertools.izip_longest(old, new):
                  if l1 is None:
                      l1 = ""
                  if l2 is None:
                      l2 = ""
                  if l1 != l2:
                      out.write(l2 + "\n")
                  else:
                      out.write(l1 + "\n")
              print("The file {0} merged in file {1}".format(
                  n.split("/")[-1], n[:-4].split("/")[-1]))