fix "mv fails transfers between dirs"

[rivy]

• includes test which demonstrates the problem

Note that this is on top of the improved testing introduced in PR#1281.

[Arcterus]

Can you also rebase your PRs? There's a lot of extra commits from the PR I just merged mixed in.

[rivy]

I'll be happy to rebase all my PRs (they had to be based upon the initial PR in order to use the CI testing). It'll take me a just a little bit of time.

[rivy]

@Arcterus , I rebased all of the basic PRs (#1304, #1305, #1315, #1316, #1317, #1319) and did some quick prelimary testing which looks fine (CI is still pending).

[rivy]

@Arcterus ,

I believe this PR should be good to merge.
Plus, besides this, will you look at the other PRs mentioned (#1304, #1305, #1315, #1316, #1317, #1319)?
I think they are all relatively straight-forward fixes.
And, I don't want them to get stale and have to all be rebased again.
I'm happy to make changes, if needed.

[rivy]

@Arcterus , @cnd , I'm checking back in on these PRs (#1304, #1305, #1315, #1316, #1317, #1319). Are there any issues that need attention or are these mergeable?

[Arcterus]

Sorry it's taken so long, I'm gonna go through these.