* Guide: Reindent the router module with 4 spaces
The guide used to use 2 spaces for indentation. The problem with that is `mdbook` doesn't recognize them as a proper indentation and thus doesn't render indent properly.
A couple of things are not indented here because they will be changed in the following commits
* Guide: a bunch of fixes
* Take 2 at the upward messages
* Trying to restore stuff from unsuccesful rebase
* Fix whitespace
* Clean up
* Change rustdoc to comment
* Pivot to a less stricter, w.r.t. to acceptance, model
* Rename `max_upward_message_num_per_candidate`
* Update docs for DownwardMessage
* Apply suggestions from code review
Co-authored-by: Robert Habermeier <rphmeier@gmail.com>
* Rephrase "Dispatchable objects ready to ..."
* Finish the sentence
* Add a note about imprecision of the current weight formula
* Elaborate on potential use-cases for the upward message kinds.
* s/later/below
Co-authored-by: Robert Habermeier <rphmeier@gmail.com>
Sergei Shulepov