'The underline style for this |Run|, one of |None|, |True|, |False|,
or a value from :ref:`WdUnderline`. A value of |None| indicates the
run has no directly-applied underline value and so will inherit the
underline value of its containing paragraph. Assigning |None| to this
property removes any directly-applied underline value. A value of
|False| indicates a directly-applied setting of no underline,
overriding any inherited value. A value of |True| indicates single
underline. The values from :ref:`WdUnderline` are used to specify
other outline styles such as double, wavy, and dotted.'

@property
def underline(self):

    return self.font.underline
