Doc.: "Multi-line editing" section doesn't doc. _entering_ multiple lines

[dsbos]

The "Multi-line editing" section currently at https://ammonite.io/#Multi-lineediting mentions how to navigate within lines in a multi-line input and then execute it.

However, that section never mentions how to create multi-line input in the first place.

Given that the "Block Input" section doesn't appear until after the "Multi-line editing" section (and its title doesn't also mention multi-line input), that "Multi-line editing" section is really confusing.

Maybe the "Block input" section should be moved to appear earlier; maybe the "Multi-line editing" section should be moved to appear later. (Maybe they should simply be combined.)