Matt <matt@excalamus.com> writes:

>  Does anyone know which function is responsible for re-fontifing source blocks?

`org-src-font-lock-fontify-block', which is using major-mode's native
fontification. The major mode is determined by `org-src-get-lang-mode',
which can be customized using `org-src-lang-modes'.

Org provides some defaults for bash in `org-src-lang-modes' but not for
other shell flavours. I guess we can add more defaults to
`org-src-lang-modes', if we know for sure that e.g. zsh can be fontified
sh-mode.

--
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
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