Hi Audrey,
What you are requesting is reasonable, but we haven't exposed the ability to configure this behavior yet.
In general, it is easy to coerce a line break with end-of-line comments like:
if (something) //
do something
though this is intended for one-off exceptions, rather than asking the user to do this everywhere.
In any case, I suggest filing a request to make formatting of single-statement-bodies configurable, and we can flesh out some ideas of what that could look like there, and maybe draw some inspiration from other languages' formatters.
If you're curious, some of the code that handles conditional is around
here.