input: from typing import List
  
  class VersionControl:
      """Build a basic version control system to track changes in the code.
      The class maintains a list of code lines and a revision mark. It has two methods:
      - `commit` which records the current state of the code in a log file and increments the mark.
      - `restore` which retrieves the code at the previous revision mark from the log file.
      
      >>> vcs = VersionControl(['print("Hello, World!")'])
      >>> vcs.commit()
      >>> vcs.lines.append('print("Another line")')
      >>> vcs.commit()
      >>> vcs.restore()
      >>> vcs.lines
      ['print("Hello, World!")']
      """
      def __init__(self, lines: List[str]):
          self.lines = lines
          self.mark = 0
   
      def commit(self):
          self.mark += 1
          log_file = open("log_file.txt", "a+")
          log_file.write(str(self.mark) + ": " + str(self.lines) + "\n")
          log_file.close()
   
      def restore(self):
          log_file = open("log_file.txt", "r")
          lines = log_file.readlines()
          to_mark = self.mark-1
          if to_mark < len(lines):
              self.lines = eval(lines[to_mark].split(": ")[1])
          log_file.close()
output:     def restore(self):
          log_file = open("log_file.txt", "r")
          lines = log_file.readlines()
          to_mark = self.mark-1
          if to_mark < len(lines):
              self.lines = eval(lines[to_mark].split(": ")[1])
          log_file.close()