Backport LaTex version of r60651:
Fix documentation for Calendar.iterweekdays(): firstweekday is a property.
Fixes second part of #2018.
diff --git a/Doc/lib/libcalendar.tex b/Doc/lib/libcalendar.tex
index 57ac4e5..935a871 100644
--- a/Doc/lib/libcalendar.tex
+++ b/Doc/lib/libcalendar.tex
@@ -38,8 +38,8 @@
\begin{methoddesc}{iterweekdays}{weekday}
Return an iterator for the week day numbers that will be used
-for one week. The first number from the iterator will be the
-same as the number returned by \method{firstweekday()}.
+for one week. The first value from the iterator will be the same
+as the value of the \member{firstweekday} property.
\end{methoddesc}
\begin{methoddesc}{itermonthdates}{year, month}