Docformatter not formatting multi-line format of docstring

[JosePintos]

I'm running the latest version of docformatter (as well as 1.7.3, 1.6.5, 1.3.1) with python 3.10.1.

Input:

def launch_rocket():
    """Launch
the
rocket. Go colonize space."""

expected:

def launch_rocket():
    """Launch the rocket.

    Go colonize space.
    """

actual output:

def launch_rocket():
    """Launch
    the
    rocket. Go colonize space.
    """