Tweaked docs

HACKING

@@ -30,7 +30,7 @@ variants: the function name is followed by two underscores and a set
 of single-character "flags" indicating what optional features that
 particular variant has (in alphabetical order, of course):
 
-  __a: takes variadic arguments as a void*[]
+  __a: takes variadic arguments as a void*[] (not implemented yet, but will be soon. 
   __m: takes a memory manager as the first argument, to override the system memory manager.
   __v: Takes the variadic argument list as a va_list
 
@@ -48,4 +48,5 @@ documented), assume that
    returns a value r, any function that uses r as a parameter must
    also be told to use m as a memory manager.
 
-In other words, don't let the (memory manager) streams cross.
+In other words, don't let the (memory manager) streams cross.
\ No newline at end of file
+