It seems my easy templates completion is being ignored. I'm  9.2
(9.2-41-g010a35-elpa ...). I've found a reference or two online but the
fix,  i.e., running (require 'org-tempo) only produced error messages. The
"documentation" doesn't really say exactly what the new format is. Here's a
sample of what my old org-structure-template-alist had:

...
("o" "#+name:\n#+begin_src ocaml :exports both :tangle yes :cache yes
:results silent\n?\n#+end_src")
("G" "#+name:\n#+begin_src gnuplot :exports both :file \n?\n#+end_src")
("r" "\\rightarrow")
...

What do I need to change about my old easy templates to work with 9.2? I
understand "<letter(s) TAB" no longer works, rather, C-c C-, should bring
up a menu.

LB