Fixed a large number of small problems, mostly noted by Detlef Lannert
<lannert@lannert.rz.uni-duesseldorf.de>.
diff --git a/Doc/lib/libre.tex b/Doc/lib/libre.tex
index 37b4ee8..9e027e7 100644
--- a/Doc/lib/libre.tex
+++ b/Doc/lib/libre.tex
@@ -180,7 +180,7 @@
of a group can be retrieved after a match has been performed, and can
be matched later in the string with the \regexp{\e \var{number}} special
sequence, described below. To match the literals \character{(} or
-\character{')}, use \regexp{\e(} or \regexp{\e)}, or enclose them
+\character{)}, use \regexp{\e(} or \regexp{\e)}, or enclose them
inside a character class: \regexp{[(] [)]}.
\item[\code{(?...)}] This is an extension notation (a \character{?}