Editorial: Unify 'else' and 'otherwise' in If step (#3733)

Editorial: Short-circuit return/throw on if-else step
Editorial: Remove else on short-circuit if/else-if step
Editorial: Inline if-else on true/false return
Editorial: Inline if-else on integer return
Editorial: Inline if-else on Number value return
Editorial: Invert condition on inline if-else
Editorial: Inline if-else on long if condition

Co-authored-by: Jungwoong Kim <jungwngkim@gmail.com>
Co-authored-by: Michael Ficarra <github@michael.ficarra.me>
Co-authored-by: Kevin Gibbons <bakkot@gmail.com>

Author: 3 people