Initial cut at documentation.

svn: r18495

collects/scribblings/reference/procedures.scrbl

@@ -65,6 +65,14 @@ produced by @scheme[define-struct],
 typically, however, @scheme[name] is not used for reporting errors,
 since the procedure name is typically hard-wired into an internal
 check.}
+                    
+@defproc[(procedure->method [proc procedure?])
+         procedure?]{
+                     
+Returns a procedure that is like @scheme[proc] except that, when applied
+to the wrong number of arguments, the resulting error hides the first
+argument as if the procedure had been compiled with the
+@indexed-scheme['method-arity-error] syntax property.}
 
 @; ----------------------------------------
 @section{Keywords and Arity}