Syntax Warning invalid escape sequence

[NicholsAndDimes]

tkcalendar 1.61
python 3.12.4

tkcalendar/calendar_.py:221: SyntaxWarning: invalid escape sequence '\ '
font = kw.pop("font", "Liberation\ Sans 9")
should be
font = kw.pop("font", "Liberation\\ Sans 9")

after fix, no longer receiving syntax warning