Merge "Revert "Revert "Apply pylint to cc/symbolfile"""

    def parse(self) -> List[Version]:

        """Parses the symbol file and returns a list of Version objects."""

        versions = []

        while self.next_line() != '':

        while self.next_line():

            assert self.current_line is not None

            if '{' in self.current_line:

                versions.append(self.parse_version())

        symbols: List[Symbol] = []

        global_scope = True

        cpp_symbols = False

        while self.next_line() != '':

        while self.next_line():

            if '}' in self.current_line:

                # Line is something like '} BASE; # tags'. Both base and tags

                # are optional here.

        A return value of '' indicates EOF.

        """

        line = self.input_file.readline()

        while line.strip() == '' or line.strip().startswith('#'):

        while not line.strip() or line.strip().startswith('#'):

            line = self.input_file.readline()

            # We want to skip empty lines, but '' indicates EOF.

            if line == '':

            if not line:

                break

        self.current_line = line

        return self.current_line