The way it's currently written, it's very confusing what the root logger's name is, because it's not explicitly stated anywhere (the how-to page says that its name "is printed as 'root'", which makes it sound like it's actually something else, but it's not it's just 'root'), and because it is stated that the logging hierarchy is based on period-separated names (this is true except for "root", and that exception isn't stated anywhere here).

Understood about not wanting people to rely on the root logger's name being `'root'`.  I rephrased it to always refer to the root logger as simply "the root logger", as is done in the rest of the document.

Co-authored-by: Vinay Sajip <vinay_sajip@yahoo.co.uk>