def METHOD_NAME(line, dict_path):
  """Correct a single dictionary line."""
  # Ignore blank and comment lines.
  if not line or line.strip().startswith('#'):
    return line
  match = DICTIONARY_PART_PATTERN.match(line)
  # We expect this pattern to match even invalid dictionary entries. Failures
  # to match should be treated as bugs in this function.
  if not match:
    raise errors.BadStateError(
        'Failed to correct dictionary line "{line}" in {path}.'.format(
            line=line, path=dict_path))
  name_part = match.group(1) or ''
  entry = match.group(2)
  # In some cases, we'll detect the user's intended entry as a token name. This
  # can happen if the user included unquoted tokens such as "!=" or ">=".
  if not entry and name_part:
    entry = name_part
    name_part = ''
  # Handle quote entries as a special case. This simplifies later logic.
  if entry == '"':
    entry = '"\\\""'
  if entry.startswith('"') and entry.endswith('"'):
    return name_part + entry
  # In this case, we know the entry is invalid. Escape any unescaped quotes
  # within it, then append quotes to the front and back.
  new_entry = ''
  prev_character = ''
  for character in entry:
    if character == '"' and prev_character != '\\':
      new_entry += '\\'
    new_entry += character
    prev_character = character
  new_entry = '"{entry}"'.format(entry=new_entry)
  return name_part + new_entry