Mention Phoenix usage

lib/phoenix_component.ex

@@ -7,6 +7,7 @@ defmodule Phoenix.Component do
   [the `~H` sigil](`sigil_H/2`):
 
       defmodule MyComponent do
+        # In Phoenix apps, the line is typically: use MyAppWeb, :html
         use Phoenix.Component
 
         def greet(assigns) do
@@ -135,6 +136,7 @@ defmodule Phoenix.Component do
   `<Component.heading>` requires a `title`, but *does not* require a `name`.
 
       defmodule Components do
+        # In Phoenix apps, the line is typically: use MyAppWeb, :html
         use Phoenix.Component
 
         attr :title, :string, required: true

lib/phoenix_live_component.ex

@@ -13,8 +13,7 @@ defmodule Phoenix.LiveComponent do
   The smallest LiveComponent only needs to define a `c:render/1` function:
 
       defmodule HeroComponent do
-        # If you generated an app with mix phx.new --live,
-        # the line below would be: use MyAppWeb, :live_component
+        # In Phoenix apps, the line is typically: use MyAppWeb, :live_component
         use Phoenix.LiveComponent
 
         def render(assigns) do
@@ -65,6 +64,7 @@ defmodule Phoenix.LiveComponent do
   a DOM ID, it is your responsibility to do so when rendering:
 
       defmodule UserComponent do
+        # In Phoenix apps, the line is typically: use MyAppWeb, :live_component
         use Phoenix.LiveComponent
 
         def render(assigns) do

lib/phoenix_live_view.ex

@@ -72,7 +72,7 @@ defmodule Phoenix.LiveView do
   `c:render/1`:
 
       defmodule MyAppWeb.ThermostatLive do
-        # In Phoenix v1.6+ apps, the line is typically: use MyAppWeb, :live_view
+        # In Phoenix apps, the line is typically: use MyAppWeb, :live_view
         use Phoenix.LiveView
 
         def render(assigns) do
@@ -139,6 +139,7 @@ defmodule Phoenix.LiveView do
   with a timer:
 
       defmodule DemoWeb.ThermostatLive do
+        # In Phoenix apps, the line is typically: use MyAppWeb, :live_view
         use Phoenix.LiveView
         ...