mass changes; fix titles; add examples; correct typos; clarifications;
unified style; etc.
diff --git a/Doc/lib/libgrp.tex b/Doc/lib/libgrp.tex
index 6310498..90a2ed3 100644
--- a/Doc/lib/libgrp.tex
+++ b/Doc/lib/libgrp.tex
@@ -13,7 +13,7 @@
The gid is an integer, name and password are strings, and the member
list is a list of strings.
(Note that most users are not explicitly listed as members of the
-group(s) they are in.)
+group they are in according to the password database.)
An exception is raised if the entry asked for cannot be found.
It defines the following items: