hook_preprocess_node and looking at
$variables. I can see there's two similar keys:
elements. I see that there's a comment in the core code:
// Helpful $content variable for templates.
next to code that copies all
elements keys into
content... I'm unsure why it's helpful, how it's different, and when one would use
content to achieve a particular goal.
This is a general question, but my task at hand is that I have two separate taxonomy term reference fields and I wish to combine them, alphabetically by term name, into one list for presentation.