Remove untrue statement about . and .. being included in list of names
passed to walk() visitor.
diff --git a/Doc/libppath.tex b/Doc/libppath.tex
index 7aec4b8..9078560 100644
--- a/Doc/libppath.tex
+++ b/Doc/libppath.tex
@@ -125,8 +125,8 @@
directory tree rooted at \var{p} (including \var{p} itself, if it is a
directory). The argument \var{dirname} specifies the visited directory,
the argument \var{names} lists the files in the directory (gotten from
-\code{posix.listdir(\var{dirname})}, so including \samp{.} and
-\samp{..}). The \var{visit} function may modify \var{names} to
+\code{posix.listdir(\var{dirname})}).
+The \var{visit} function may modify \var{names} to
influence the set of directories visited below \var{dirname}, e.g., to
avoid visiting certain parts of the tree. (The object referred to by
\var{names} must be modified in place, using \code{del} or slice