Fix Hoek.reach() docs formatting issue (#376)

API.md

@@ -229,7 +229,7 @@ Converts an object key chain string or array to reference
     - `default` - value to return if the path or value is not present, default is `undefined`
     - `strict` - if `true`, will throw an error on missing member, default is `false`
     - `functions` - if `true`, allow traversing functions for properties. `false` will throw an
-      error if a function is part of the chain. Defaults to `true.
+      error if a function is part of the chain. Defaults to `true`.
     - `iterables` - if `true`, allows traversing Set and Map objects. `false` will result in
       `undefined` return value is the chain contains any Set or Map objects. Note that enabling
       `iterables` can impact performance by up to 10% for all calls regardless of the presence of