Code Style refactoring

[TigerGorilla2]

• replace 'tabs' with spaces
• add spaces before, after, and between braces
• remove (white-)spaces at the end of lines

This makes it more consistent to read, and modify and is just a good coding practice.

[RuurdBijlsma]

i tested all 4 PRs together and they seem to work well so i'll publish it to openplanet