# Processing: removed_prefix and removed_suffix are removed from each element,
# added_prefix and added_suffix are added to each element.
# removed_prefix, removed_suffix should not contain the characters "$`\{}[]^|.
-# added_prefix, added_suffix should not contain the characters \|.
+# added_prefix, added_suffix should not contain the characters \|&.
func_filter_filelist ()
{
if test "$2" != "$nl" \