Justin Vallon <justinvallon@gmail.com> writes:

> When I use "emacs --no-init-file", I get the default distribution org
> packages, and "<s" TAB expands to "#+BEGIN_SRC\n#+END_SRC\n".  However,
> in my downloaded-melpa-install of org, it does not work.
>
> Distro org-version is 9.1.9, melpa is 9.3.  describe-key TAB shows
> org-cycle, which is a kitchen-sink function.  The docs of the function
> has not changed between the versions.
>
> I believe "<s" TAB worked in a melpa version before 9.3 (maybe 9.2.6),
> but I don't have any version besides 9.3 in ~/.emacs.d/elpa.

Possibly you want to switch to the new feature (accessible C-c C-,)
which BTW allows to wrap regions.

The "<s" TAB mechanism is still available but you need to enable it.
See the documentation in section Structure Templates.