@@ -193,7 +193,7 @@ front, and the first part `p.s` is welded to the back.
195The `zipper` arm takes two tapes and creates a `map` out of them -- an
195The `zipper` arm takes two tapes and creates a `map` out of them -- an
196−an association between their elements.
196+association between their elements.
198So then if `tapes` are easier to manipulate, why then are we producing `cords`?
198So then if `tapes` are easier to manipulate, why then are we producing `cords`?
199In this case what we are going to to be doing is mapping a single element of a `
199In this case what we are going to to be doing is mapping a single element of a `