* gem: update page * Use `snake_case` for placeholders * Update the documentation URL * ruby: move `irb` example to a separate page * rake: add page * ruby: reference other ruby-related pages Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com> * irb: standard input => `stdin` (#10436) --------- Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>