tuple rep

book.tex

@@ -3864,8 +3864,6 @@ would run out of memory.\footnote{The $R_3$ language does not have
   recursive functions in the next Chapter!} A Racket implementation
 must therefore perform automatic garbage collection.
 
-\marginpar{\tiny todo: add a paragraph about the \key{Vectorof} type. \\ --Jeremy}
-
 
 \section{Garbage Collection}
 \label{sec:GC}