Comma

VL2.tex

@@ -170,7 +170,7 @@ f x
   where
     a = w x
 \end{haskellcode}
-While that is not possible with \code{let} which is an actual expression and can be used whenever expressions are allowed (e.g. inside \emph{Monads}, we'll know more about these in a few weeks).
+While that is not possible with \code{let}, which is an actual expression and can be used whenever expressions are allowed (e.g. inside \emph{Monads}, we'll know more about these in a few weeks).
 \vspace{\baselineskip}
 \\
 There are a few more intricacies, but most of the time this is just style consideration:\\ \url{https://wiki.haskell.org/Let_vs._Where}