In the webpage environment, StructuredJS tests consider single quotes differently from double quotes

For example, with this pattern:
var matchP = function() {
var heading = _ + "px";
}

It would not match this code:
var heading = amount + 'px';

I noticed this in the jQuery course and worked around it by using placeholder variables and constraints to check the value.

It's possible this was a regression - I noticed issues in the Cat-stache challenge starting around August 18th that were suddenly to do it not matching the other quotes.

Reproduce the pattern in the webpage environment and inspect how StructuredJS tests compare single- and double-quoted strings. Check the jQuery course and Cat-stache challenge examples for the reported regression. Done means equivalent quote styles match consistently, with regression coverage for both forms.

Written by the indexing model from the issue text.