message: Update taghelper test plan
diff: @@ -155,7 +155,9 @@ void Foo(){
  Note that the pipe in the below examples indicates the cursor.
  * Typing `<environment>` prompts you with HTML completion for the `environment` tag and on completion commit auto-completes the closing tag.
  * Type `<cache |`, hit ctrl + space, search for `asp-vary-by-user`, commit the completion. Ensure that it auto-completes the attribute to: `<cache asp-vary-by-user`.
  -* Type `<form |`, hit ctrl + space, search for `asp-route-...`, commit the completion. Ensure that it auto-completes the attribute to: `<form asp-route-|=""`. Type `foo` and then hit tab. Cursor should be inside of the double quotes: `<form asp-route-foo="|"`.
  +* Type `<cache |`, hit ctrl + space, search for `enabled`, commit the completion with a ` `. Ensure that it auto-completes the attribute to: `<cache enabled |`.
  +* Type `<cache |`, hit ctrl + space, search for `enabled`, commit the completion with a `=`. Ensure that it auto-completes the attribute to: `<cache enabled=|`.
  +* Type `<form |`, hit ctrl + space, search for `asp-route-...`, commit the completion. Ensure that it auto-completes the attribute to: `<form asp-route-|`.
  ##### TagHelper colorization
  * Typing `<environment include="Development" notcolored="differently"></environment>` should change the color of `environment` and `include` (but not `notcolored`)to a blue-green color in the dark theme or a darker blue in the light theme. These colors should be visually distinct from html elements on the page while also not being the same color as an invalid element (`<notatag></notatag>` for an example).
  