As xuchunyang noted in comments, your shouldn't use prose-mode to name a function that doesn't define a mode, so you could define your function like this:
"Load additional stuff with olivetti-mode."
Note that display-line-numbers-mode, accepts an optional ...
Put this in $HOME/.emacs.d/init.el and start up emacs:
(setq inhibit-startup-screen t)
If you want to visit a URL instead, just replace the second line with
It depends on what you're expecting out of it. On a given date agenda, pressing M will show you all the relevant info about moon ephemerides.
If you want it inside your, say, daily agenda you'll have to add them as sexps in any of your agenda files. Note that there shouldn't be any subtree indentation before %%
* Moon phases
You set clang-format-style to "file". In that case, clang-format.el will first look for a .clang-format file. It it finds one, it will use it. Otherwise, it will check the clang-format-fallback-style. If that is set to "none", no changes will be made.
If that is not want you want, you have two options:
Provide a .clang-format file (*)
Change the clang-...