Load of list of commands and descriptions from a file.

def parse_help_text(self, file_path):
        ''' Load of list of commands and descriptions from a file. '''
        with open(file_path) as f:
            lines = f.readlines()

        # Parse commands and descriptions, which are separated by a multi-space
        # (any sequence of two or more space characters in a row.
        cmds = []
        descs = []
        for line in lines:
            line = line.strip()
            if len(line) == 0:
                cmds.append('')
                descs.append('')
            else:
                tokens = line.split('  ')
                cmds.append(tokens[0])
                descs.append(''.join(tokens[1:]).strip())

        max_len = len(max(cmds, key=len))

        # Convert commands and descriptions into help text.
        text = ''
        for cmd, desc in zip(cmds, descs):
            if len(cmd) == 0:
                text += '\n'
            else:
                text += self.style.help(cmd.ljust(max_len + 2), desc + '\n')

        return cmds, text