Merge pull request getify#794 from mmmaaatttttt/patch-1

small typo fix

types & grammar/ch3.md

@@ -478,7 +478,7 @@ One minor side-benefit of this approach is that the `.prototype`s are already cr
 
 Also, be very careful not to use `Array.prototype` as a default value **that will subsequently be modified**. In this example, `vals` is used read-only, but if you were to instead make in-place changes to `vals`, you would actually be modifying `Array.prototype` itself, which would lead to the gotchas mentioned earlier!
 
-**Note:** While we're pointing out these native prototypes and some usefulness, be cautious of relying on them and even more wary of modifying them in anyway. See Appendix A "Native Prototypes" for more discussion.
+**Note:** While we're pointing out these native prototypes and some usefulness, be cautious of relying on them and even more wary of modifying them in any way. See Appendix A "Native Prototypes" for more discussion.
 
 ## Review