"Link text unclear" should detect image links as image links

[kevinbarabash]

Right now it comes up with the following message for the image link on the gh-pages.

The text " " is unclear without context
and may be confusing to screen readers. Consider
rearranging the <a></a> tags or
including special screen reader text.

It would be nice if it said something like:

You have an image link without alt text.  Please add an alt attribute to the img tag.

[jdan]

This is an outstanding bug for Accessibility Developer Tools. GoogleChrome/accessibility-developer-tools#156

We can remedy it by adding an extra check for getTextFromDescendantContent until they fix, though :)

[kevinbarabash]

I didn't realize it was a bug b/c when I was looking at it before you added alt text to the image on gh-pages. In addition to fixing the bug, I was thinking it would be nice to have an error message that calls out that's it's an image link issue. It's really a nice to have. Since I'm interested in it, I'll look into and send you pull request when I have some time.

[jdan]

I was thinking it would be nice to have an error message that calls out that's it's an image link issue

Great idea, I imagine this is a common use-case.