Fix typos.

readme.md

@@ -43,14 +43,14 @@ An additional long term aim is to address the over-abundance of names
 within the OCaml ecosystem. Currently a library with a single module has
 at least 4 names associated with it:
 
-1. The name of it's module
-2. The name of it's .cmxa archive file
-3. The name of it's ocamlfind library
-4. The name of it's opam package
+1. The name of its module
+2. The name of its .cmxa archive file
+3. The name of its ocamlfind library
+4. The name of its opam package
 
 Ideally all these names are identical, but it would still be good to get
 rid of some of them. This proposal aims to remove 2 immediately and to
-lay the ground-work towards eliminating 3, at least for the majority of
+lay the groundwork towards eliminating 3, at least for the majority of
 packages.
 
 ## Design
@@ -467,4 +467,4 @@ to locate. For this reason the implementation has been split into two
 separate patches. The first patch will make OCaml's handling of names
 more precise without changing any of OCaml's external behaviour. The
 second will then implement this proposal, taking advantage of the
-increased precision to make its correctness more obvious.
+increased precision to make its correctness more obvious.