Looking at one of the files in a hex editor, the opening and closing (double) quotes are #22 characters, i.e. a double quote.
It's clearly Dreamweaver that is mis-displaying the closing one for its own nefarious purposes
is pasted straight out of Dreamweaver, but Dreamweaver insists on displaying the 2 closing quotes as single ones. Even more oddly, when I selected the line to copy, in the highlighted line Dreamweaver changed the 2 single quotes to double ones. So in a selected line the quotes are displayed correctly, in an unselected line they're not