README: Update ParamsFromContext documentation

Author: julienschmidt

README.md

@@ -64,7 +64,7 @@ func main() {
 
 As you can see, `:name` is a *named parameter*. The values are accessible via `httprouter.Params`, which is just a slice of `httprouter.Param`s. You can get the value of a parameter either by its index in the slice, or by using the `ByName(name)` method: `:name` can be retrieved by `ByName("name")`.
 
-**Note:** Since go 1.7 you may also access named parameters from `request.Context` if you're using the `http.Handler` api. See more below under `Why doesn't this work with http.Handler?`.
+When using a `http.Handler` (using `router.Handler` or `http.HandlerFunc`) instead of HttpRouter's handle API using a 3rd function parameter, the named parameters are stored in the `request.Context`. See more below under [Why doesn't this work with http.Handler?](#why-doesnt-this-work-with-httphandler).
 
 Named parameters only match a single path segment:
 
@@ -132,16 +132,18 @@ For even better scalability, the child nodes on each tree level are ordered by p
 
 **It does!** The router itself implements the `http.Handler` interface. Moreover the router provides convenient [adapters for `http.Handler`](https://godoc.org/github.com/julienschmidt/httprouter#Router.Handler)s and [`http.HandlerFunc`](https://godoc.org/github.com/julienschmidt/httprouter#Router.HandlerFunc)s which allows them to be used as a [`httprouter.Handle`](https://godoc.org/github.com/julienschmidt/httprouter#Router.Handle) when registering a route.
 
-~~The only disadvantage is, that no parameter values can be retrieved when a `http.Handler` or `http.HandlerFunc` is used, since there is no efficient way to pass the values with the existing function parameters. Therefore [`httprouter.Handle`](https://godoc.org/github.com/julienschmidt/httprouter#Router.Handle) has a third function parameter.~~
-
-Since go 1.7 you can access named params from `request.Context`.
+Named parameters can be accessed `request.Context`:
 
 ```go
-params := r.Context().Value(httprouter.ParamsKey)
-// or use the helper
-params := httprouter.ParamsFromContext(r.Context())
+func Hello(w http.ResponseWriter, r *http.Request) {
+	params := httprouter.ParamsFromContext(r.Context())
+
+    fmt.Fprintf(w, "hello, %s!\n", params.ByName("name"))
+}
 ```
 
+Alternatively, one can also use `params := r.Context().Value(httprouter.ParamsKey)` instead of the helper function.
+
 Just try it out for yourself, the usage of HttpRouter is very straightforward. The package is compact and minimalistic, but also probably one of the easiest routers to set up.
 
 ## Where can I find Middleware *X*?