Some buffers which use markdown-mode or yaml mode yield errors when
using the prettier-js package to format them, as it looks at the file
extension by default to figure out what parser to use.
Some temporary files that use these modes don't have the correct file
extension, so prettier-js yields an error. My manually specifying the
correct "--parser" option for each major-mode, this is no longer an
issue.
There are a few major modes which are not based on prog-mode, that I
want to behave like prog-mode. Previously each did nearly all the same
setup that's done via the prog-mode hooks. Now instead let's actually
run runs the hooks for prog-mode.
- Switch from highlight-indentation package to highlight-indent-guides.
- Activate visual indentation in a prog-mode hook, rather than doing
within each individual major mode. It was already done within all
major modes based on prog-mode anyway.
- Add new siren-display-indetation module and function as a central way
to enable visual indetation guides. This makes switching the
underlying package at some point in the future much easier.
