Use funcdesc instead of classdesc to be consistent with out sections.
diff --git a/Doc/lib/libdatetime.tex b/Doc/lib/libdatetime.tex
index 772355b..36e5de6 100644
--- a/Doc/lib/libdatetime.tex
+++ b/Doc/lib/libdatetime.tex
@@ -133,11 +133,12 @@
\subsection{\class{timedelta} Objects \label{datetime-timedelta}}
-\begin{classdesc}{timedelta}{days=0, seconds=0, microseconds=0,
- milliseconds=0, minutes=0, hours=0, weeks=0}
A \class{timedelta} object represents a duration, the difference
between two dates or times.
+\begin{funcdesc}{timedelta}{days=0, seconds=0, microseconds=0,
+ milliseconds=0, minutes=0, hours=0, weeks=0}
+
All arguments are optional. Arguments may be ints, longs, or floats,
and may be positive or negative.
@@ -177,8 +178,7 @@
>>> (d.days, d.seconds, d.microseconds)
(-1, 86399, 999999)
\end{verbatim}
-
-\end{classdesc}
+\end{funcdesc}
Class attributes are: