gh-101377: improving test_locale_calendar_formatweekday of calendar (#101378)

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Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

Author: 3 people

Lib/test/test_calendar.py

@@ -568,11 +568,15 @@ def test_locale_calendar_formatweekday(self):
         try:
             # formatweekday uses different day names based on the available width.
             cal = calendar.LocaleTextCalendar(locale='en_US')
+            # For really short widths, the abbreviated name is truncated.
+            self.assertEqual(cal.formatweekday(0, 1), "M")
+            self.assertEqual(cal.formatweekday(0, 2), "Mo")
             # For short widths, a centered, abbreviated name is used.
+            self.assertEqual(cal.formatweekday(0, 3), "Mon")
             self.assertEqual(cal.formatweekday(0, 5), " Mon ")
-            # For really short widths, even the abbreviated name is truncated.
-            self.assertEqual(cal.formatweekday(0, 2), "Mo")
+            self.assertEqual(cal.formatweekday(0, 8), "  Mon   ")
             # For long widths, the full day name is used.
+            self.assertEqual(cal.formatweekday(0, 9), "  Monday ")
             self.assertEqual(cal.formatweekday(0, 10), "  Monday  ")
         except locale.Error:
             raise unittest.SkipTest('cannot set the en_US locale')

Misc/NEWS.d/next/Tests/2023-01-27-18-10-40.gh-issue-101377.IJGpqh.rst

@@ -0,0 +1 @@
+Improved test_locale_calendar_formatweekday of calendar.