Commited codestyle settings:
all default to IDEA except thatif,for,while,do force braces for multiline bodies. Meaning you can write either

if (true) bar();

or

if (true) {  bar();}

Forcing braces for multiline if/for/etc makes code less error prune. If not forcing one day someone will for sure add second statement and forget to add braces. The code will break and tests may miss it.

All changes in the PR are result of automating IDEA formatting without any handmade changes