I'm using the Brackets editor, and I ran into this extension.
If you look at the picture on this extension's page you can see the small light bulbs next to some lines. I really want this feature, so I've installed the extension, but I can't see those light bulbs.
Is it a part of this extension or is it another extension in this picture?
If so, which one is it?
Those icons come from the Brackets Interactive Linter extension, created by the same author. However, they don't give you "auto correct" options like the lightbulbs in some other editors. As far as I can tell, the icon just shows you more details about the linting error.
If "auto correct" is what you're looking for, you might still be able to interest someone in working on that functionality. (The Brackets community is pretty responsive!). I suggest: