@property
    def is_diff_meta(self):
        if self.line.startswith(('---', '+++')):
            return True
        return not self.line.startswith((' ', '#', '\n', '-', '+'))
Returns True if the line is a metadata line from plain old diff.
dataset/ETHPy150Open hut8labs/diffscuss/diffscuss/support/editor.py/LineProperties.is_diff_meta