When one uses
C-c C-e to insert an environment such as
enumerate in AUCTeX , one is presented with the prompt
(Optional) Options (k=v): in the minibuffer.
I know that this is asking for options for the environment, but could someone please explain what the
(k=v) means? It appears in certain environments' options prompts (e.g.
itemize), but not in others (e.g.
tabular). I couldn't find any explanation online. My AUCTeX version is 11.89, if that's important.