Update the filter() and list() descriptions to include information about
the support for containers and iteration.
diff --git a/Doc/lib/libfuncs.tex b/Doc/lib/libfuncs.tex
index 7c65bec..42b3497 100644
--- a/Doc/lib/libfuncs.tex
+++ b/Doc/lib/libfuncs.tex
@@ -234,12 +234,13 @@
\end{funcdesc}
\begin{funcdesc}{filter}{function, list}
-Construct a list from those elements of \var{list} for which
-\var{function} returns true. If \var{list} is a string or a tuple,
-the result also has that type; otherwise it is always a list. If
-\var{function} is \code{None}, the identity function is assumed,
-i.e.\ all elements of \var{list} that are false (zero or empty) are
-removed.
+ Construct a list from those elements of \var{list} for which
+ \var{function} returns true. \var{list} may be either a sequence, a
+ container which supports iteration, or an iterator, If \var{list}
+ is a string or a tuple, the result also has that type; otherwise it
+ is always a list. If \var{function} is \code{None}, the identity
+ function is assumed, i.e.\ all elements of \var{list} that are false
+ (zero or empty) are removed.
\end{funcdesc}
\begin{funcdesc}{float}{x}
@@ -378,12 +379,13 @@
\end{funcdesc}
\begin{funcdesc}{list}{sequence}
-Return a list whose items are the same and in the same order as
-\var{sequence}'s items. If \var{sequence} is already a list,
-a copy is made and returned, similar to \code{\var{sequence}[:]}.
-For instance, \code{list('abc')} returns
-returns \code{['a', 'b', 'c']} and \code{list( (1, 2, 3) )} returns
-\code{[1, 2, 3]}.
+ Return a list whose items are the same and in the same order as
+ \var{sequence}'s items. \var{sequence} may be either a sequence, a
+ container that supports iteration, or an iterator object. If
+ \var{sequence} is already a list, a copy is made and returned,
+ similar to \code{\var{sequence}[:]}. For instance,
+ \code{list('abc')} returns \code{['a', 'b', 'c']} and \code{list(
+ (1, 2, 3) )} returns \code{[1, 2, 3]}.
\end{funcdesc}
\begin{funcdesc}{locals}{}