Add english documentation for :methods.

Author: Affonso-Gui

doc/latex/objects.tex

@@ -283,9 +283,8 @@ \subsection{Basic Classes}
 \methoddesc{:slots}{}{
 returns a list of variable and value pairs of this object.}
 
-\methoddesc{:methods}{}{
-returns a list of all method names defined for this object.
-In other words, this object can accept method calls listed by :methods. }
+\methoddesc{:methods}{\&optional subname}{
+returns a list of all methods callable by this object. If {\em subname} is given, returns only methods with names that include {\em subname}. }
 
 \methoddesc{:get-val}{variable-name}{
 returns the value of the slot designated by {\it variable-name}.