The minimalistic editor

I have been using this IDE and I'm marvelled at the simple important things that were left out of the editor. So, I decided to make a list of the things that should make up a simple minimalistic editor, from my own perspective, as a developer.

The core
Really, this is all you need to have in an editor. If you miss any of these, you don't have an editor yet.

• Syntax highlighting/Code coloring
• Line numbering
• Auto indenting
• Word wrap
• Code block collapsing

The forgivables
Your editor can have these but if you miss any of it, you are forgivable.

• Auto complete (depends on your target programming language. For a general editor you must have html, css and some basic C methods in there)
• Multiple file tabs
• File explorer sidebar

Overkill
Want to take one step further? Just these other two:

• Multiple views (different or same file in like two views in same window)
• Themes (or style customization)

That does it for me. Now, your turn. What makes a simple editor to you?