-a **continuation** of the recipe. So in this context, a continuation
-is a function of type `char list -> char list`. For instance, the
-continuation corresponding to the portion of the recipe below the
-horizontal line is the function `fun (tail:char list) -> a::(b::tail)`.
-
-This means that we can now represent the unzipped part of our
-zipper--the part we've already unzipped--as a continuation: a function
-describing how to finish building the list. We'll write a new
-function, `tc` (for task with continuations), that will take an input
-list (not a zipper!) and a continuation and return a processed list.
-The structure and the behavior will follow that of `tz` above, with
-some small but interesting differences. We've included the orginal
-`tz` to facilitate detailed comparison:
+(or group of steps) a **continuation** of the recipe. So in this
+context, a continuation is a function of type `char list -> char
+list`. For instance, the continuation corresponding to the portion of
+the recipe below the horizontal line is the function `fun (tail:char
+list) -> a::(b::tail)`.
+
+This means that we can now represent the unzipped part of our zipper
+as a continuation: a function describing how to finish building the
+list. We'll write a new function, `tc` (for task with continuations),
+that will take an input list (not a zipper!) and a continuation and
+return a processed list. The structure and the behavior will follow
+that of `tz` above, with some small but interesting differences.
+We've included the orginal `tz` to facilitate detailed comparison: