improve referencing to code editor for mobile readers (#2632)

* improve referencing to code editor for mobile readers

The current documentation mentions "to the right" which is not accurate for people reading the tutorial on narrow-viewport devices.

I changed it to "the code editor", but this may be improved upon to match other more common references.

* typo

site/content/tutorial/01-introduction/01-basics/text.md

@@ -29,4 +29,4 @@ Each tutorial chapter will have a 'Show me' button that you can click if you get
 
 ## Understanding components
 
-In Svelte, an application is composed from one or more *components*. A component is a reusable self-contained block of code that encapsulates HTML, CSS and JavaScript that belong together, written into a `.svelte` file. The 'hello world' example on the right is a simple component.
+In Svelte, an application is composed from one or more *components*. A component is a reusable self-contained block of code that encapsulates HTML, CSS and JavaScript that belong together, written into a `.svelte` file. The 'hello world' example in the code editor is a simple component.