Accessibility quickfix (#101)
Accessibility quickfix (#101)

* Update interface_design_style_guide.md

Link is broken online, but works OK in Jekyll.  Trying to fix it for online.

* Update interface_design_style_guide.md

I can't be certain that a relative path will work in production, so I am remaking the link to be an absolute URL that should work.

Also, a small style adjustment.

* Update interface_design_style_guide.md

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