fixed up confused get-metadata arity

svn: r12190

collects/drscheme/private/language.ss

@@ -517,7 +517,7 @@
                                                  (use-namespace-require/copy-from-setting? setting)))
       (define/public (extra-repl-information _1 _2) (void))
       (define/public (get-reader-module) #f)
-      (define/public (get-metadata a b c) #f)
+      (define/public (get-metadata a b) #f)
       (define/public (metadata->settings m) #f)
       (define/public (get-metadata-lines) #f)
       

collects/scribblings/tools/language.scrbl

@@ -791,7 +791,7 @@ to this url.
 
 }}
 
-@defmethod[(get-metadata)
+@defmethod[(get-metadata [modname symbol?] [settings any/c])
            string?]{
 
 This method is only called when
@@ -806,6 +806,10 @@ opened in DrScheme.
 The string is expect to be a prefix to the file that sets up
 a reader for files in this language, using @tt{#reader}.
 
+The @scheme[modname] argument's printed form is the same as the file's
+name, but without the path, and without an extension. The
+@scheme[settings] argument is the current language's settings value.
+
 See also
 @method[drscheme:language:language<%> metadata->settings],
 @method[drscheme:language:language<%> get-metadata-lines], and