Backport r58942:
Fix TextCalendar.prweek(). This closes issue #1427.
diff --git a/Lib/calendar.py b/Lib/calendar.py
index 8f2239c..0461523 100644
--- a/Lib/calendar.py
+++ b/Lib/calendar.py
@@ -263,7 +263,7 @@
         """
         Print a single week (no newline).
         """
-        print self.week(theweek, width),
+        print self.formatweek(theweek, width),
 
     def formatday(self, day, weekday, width):
         """