When using an img tag do you tend to set it up like this?
<img src="img.jpg" alt="Image" />
Well, that little trailing slash is no longer needed on self closing tags with HTML5. So you can now just do this:
<img src="img.jpg" alt="Image">
However, you don’t have to remove it, the spec says it is optional. Still you may want to consider it since it is now really just extra.