Fix quoting problem in my previous commit

Author: Dave Moon

base/interactiveutil.jl

@@ -237,10 +237,10 @@ typesof(args...) = map(a->(isa(a,Type) ? Type{a} : typeof(a)), args)
             end
         end
     elseif ex.head == :thunk
-        exret = quote error("expression is not a function call, "
-                            * "or is too complex for @", $fcn, " to analyze; "
-                            * "break it down to simpler parts if possible")
-                end
+        msg = "expression is not a function call, " *
+              "or is too complex for @$fcn to analyze; " *
+              "break it down to simpler parts if possible"
+	exret = quote error($msg) end
     end
     exret
 end