fix #832 (\noeledsec never existed)

reledmac.dtx

@@ -3999,8 +3999,7 @@
 % You have to insert it manually via \protect\cs{beforeeledchapter}, which must be called outside of a numbered section.
 %
 % \subsection{Optimization}\label{optimize}
-% \DescribeMacro{\noeledsec}
-% If you are not going to have any \protect\cs{eledxxx} commands, then load \macpackage\  with \protect\cs{noeledsec} option.
+% If you are not going to have any \protect\cs{eledxxx} commands, then load \macpackage\  with \protect\option{noeledsec} option.
 % That will suppress the generation of unneeded \file{.eledsec} files, save memory, and make \macpackage\ run faster.
 %
 % \section{Quotation environments}