- Renaming the parameter `check_for_path_char` to a more
  self-descriptive `disallow_path_chars`
- Renaming the variable `name_length` in check_table_name()
  to a more self-descriptive `char_length`.
- Fix the `while` loop in check_table_name() into a
  `for` loop and replace multiple {{char_length++}}
  (the former {{name_length++}}) statements to a signle increment
  statement in the `for` loop header.