Persistent Line breaks after if

[t-kalinowski]

Currently,

A snippet like this:

if (some_condition) 
  x <- 1

Will get collapsed to one line:

if (some_condition) x <- 1

What do you think about making the line break persistent after if, like line breaks after a function call opener are?

Happy to submit a PR.

[DavisVaughan]

#340 is going to start autobracing this unconditionally, fixing a whole host of related issues, see also https://style.tidyverse.org/syntax.html#if-statements