restructured library manual accordiung to functional group
diff --git a/Doc/libfuncs.tex b/Doc/libfuncs.tex
index 4778c7d..b526fcc 100644
--- a/Doc/libfuncs.tex
+++ b/Doc/libfuncs.tex
@@ -197,7 +197,8 @@
Convert a number to a plain integer. The argument may be a plain or
long integer or a floating point number. Conversion of floating
point numbers to integers is defined by the C semantics; normally
- the conversion truncates towards zero.
+ the conversion truncates towards zero.\footnote{This is ugly --- the
+ language definition should require truncation towards zero.}
\end{funcdesc}
\begin{funcdesc}{len}{s}