on Windows, the intial dialog size will automatically be bigger on Motif than on Windows.
\pythonnote{If you wish to create a sizer class in wxPython you should
-derive the class from \tt{wxPySizer} in order to get Python-aware
+derive the class from {\tt wxPySizer} in order to get Python-aware
capabilities for the various virtual methods.}
\wxheading{Derived from}