refresh time docs lacks the correct command

[Kyle Nitzsche]

This page: https://docs.ubuntu.com/core/en/reference/automatic-refreshes

does not show the command to actually display the useful refresh timer info, which is:

knitzsche@pi3:~$ snap refresh --time
schedule: 00:00-04:59/5:00-10:59/11:00-16:59/17:00-23:59
last: 2018-02-14T11:33:00Z
next: 2018-02-14T22:35:00Z

And this one, which is listed, provides misleading info unless you really know how to read it:
knitzsche@pi3:~$ systemctl list-timers snapd.refresh.timer
NEXT LEFT LAST PASSED UNIT ACTIVATES
Mon 2018-02-19 03:10:36 UTC 4 days left Mon 2018-02-12 01:38:46 UTC 2 days ago snapd.refresh.timer snapd.refresh.service

That one ^ naively seems to show that the next refesh is 2018-02-19 03:10:36 UTC, which is not so (the first command actually shows the next scheduled refresh time).

[Graham Morrison (morrisong)]

Thanks for reporting this Kyle.

As we're updating the Ubuntu Core documentation, and hopefully addressing this issue, I'll mark this as 'In progress' and keep track of it to make sure it's addressed in our updates.

[Graham Morrison (morrisong)]

I just fixed this as I was pushing a few other changes to the core docs.