control.js
    - Revised comments and made minor formatting changes.
  console.js
    - Modified the console to accept and handle backspaces.
  deviceDriverKeyboard.js
    - Modified the keyboard driver to process the backspace character.
      Originally, the backspace character was ignored.
  shell.js
    - Provided skeleton code for a new shell command ("whereami")
      The actual function still needs to be implemented
  utils.js
    - Revised comments and made minor formatting changes.