Thumnail class anchor elements don't fill thumbnail "frame" when image is smaller than its container

[colin-marshall]

How to reproduce this bug:

1. Go to https://foundation.zurb.com/sites/docs/thumbnail.html
2. Enlarge browser window 1350px or wider
3. Observe middle thumbnail example of .thumbnail class on anchor tag

What should happen:

Middle thumbnail image should appear like the first and third/last thumbnail

What happened instead:

--

This happens because the max-width: 100% on the anchor makes the thumbnail "frame" take up the width of the parent container. When the image, at its largest width, is smaller than the container, you get the result above.

This is easily fixable with some extra CSS, but I am not sure if there's a good reason to support having the thumbnail class on the anchor tag because it defeats the purpose if you have to add custom CSS rules to make it work.

[DanielRuf]

See foundation/foundation-docs#30

This is no bug in Foundation Sites, the styles are only in the docs.