search result highlights break image links

[aaronjudd]

using "products", and viewing console you'll see breaking links. We need to tweak the regex replace a little.

The search function will highlight the search term with a , and will also add that to URLs:

screen shot 2018-01-26 at 2 35 35 pm

[machikoyasuda]

Closing b/c duplicate w/ #89