Update Lib/calendar.py

Co-authored-by: sunmy2019 <59365878+sunmy2019@users.noreply.github.com>

Author: terryjreedy

Lib/calendar.py

@@ -17,7 +17,7 @@
            "timegm", "month_name", "month_abbr", "day_name", "day_abbr",
            "Calendar", "TextCalendar", "HTMLCalendar", "LocaleTextCalendar",
            "LocaleHTMLCalendar", "weekheader",
-           "Weekdays","Months", "JANUARY", "FEBRUARY", "MARCH", 
+           "Weekdays", "Months", "JANUARY", "FEBRUARY", "MARCH", 
            "APRIL", "MAY", "JUNE", "JULY", 
            "AUGUST", "SEPTEMBER", "OCTOBER", "NOVEMEMBER", "DECEMBER",
            "MONDAY", "TUESDAY", "WEDNESDAY", "THURSDAY", "FRIDAY",