I'm trying to figure out how to best typeset primed values. It seems that, e.g.
$f\prime$ give off a slightly different result:
I like the right (
$a\prime$) version better, but I'm not sure if that's correct.
EDIT after going over my preamble, I found the "culprit" - it was the package
unicode-math, which I added to be able to use
\Colon. After removing it, my primes rendered exactly like in Mico's answer.