Line editing for Functors (#1127)

Author: christinerose

data/tutorials/lg_06_functors.md

@@ -10,20 +10,20 @@ date: 2021-05-27T21:07:30-00:00
 # Functors
 
 Functors are probably one of the most complex features of OCaml, but you don't
-have to use them extensively to be a successful OCaml programmer.  Actually,
+have to use them extensively to be a successful OCaml programmer. Actually,
 you may never have to define a functor yourself, but you will surely encounter
 them in the standard library. They are the only way of using the Set and Map
 modules, but using them is not so difficult.
 
 ## What Are Functors and Why Do We Need Them?
 
-A functor is a module that is parametrized by another module, just like a
-function is a value which is parametrized by other values, the arguments.
+A functor is a module that is parametrised by another module, just like a
+function is a value which is parametrised by other values, the arguments.
 
-It allows one to parametrize a type by a value, which is not possible directly
+It allows one to parametrise a type by a value, which is not possible directly
 in OCaml without functors. For example, we can define a functor that takes an
-int n and returns a collection of array operations that work exclusively on
-arrays of length n. If by mistake the programmer passes a regular array to one
+`int n` and returns a collection of array operations that work exclusively on
+arrays of length `n`. If by mistake the programmer passes a regular array to one
 of those functions, it will result in a compilation error. If we were not using
 this functor but the standard array type, the compiler would not be able to
 detect the error, and we would get a runtime error at some undetermined date in
@@ -37,7 +37,7 @@ things: the type of elements, given as `t` and the comparison function given as
 `compare`. The point of the functor is to ensure that the same comparison
 function will always be used, even if the programmer makes a mistake.
 
-For example, if we want to use sets of ints, we would do this:
+For example, if we want to use sets of `ints`, we would do this:
 
 ```ocaml
 # module Int_set =
@@ -96,8 +96,8 @@ module Int_set :
 
 For sets of strings, it is even easier because the standard library provides a
 `String` module with a type `t` and a function `compare`. If you were following
-carefully, by now you must have guessed how to create a module for the
-manipulation of sets of strings:
+carefully, by now you must have guessed how to create a module to
+manipulate string sets:
 
 ```ocaml
 # module String_set = Set.Make (String);;
@@ -177,7 +177,7 @@ struct
 end
 ```
 
-or by specifying this in the .mli file:
+or by specifying this in the `.mli` file:
 
 <!-- $MDX skip -->
 ```ocaml