Some minor typo/bug fixes, and fix for issue #33 & #67.

[FizzyGalacticus]

Some of the debug statements in RIEStatefulBase were using string template literal syntax, but missed using the tick instead of quote for it to work. Those should now output the intended debugging messages.

Also change the !== comparator in RIEStatefulBase to != to determine whether or not the value of the element had changed. This prevents an unnecessary update function call when the values are the same, just one a number and the other a string.