### Please describe the problem.


### What steps will reproduce the problem?


### What version of git-annex are you using? On what operating system?


### Please provide any additional information below.

[[!format sh """
lena:/tmp
$> git clone http://kumo.ovgu.de/~mih/myHP/bd2/4e4aa-7aea-11e6-9d5d-002590f97d84/
Cloning into '4e4aa-7aea-11e6-9d5d-002590f97d84'...

$> cd 4e4aa-7aea-11e6-9d5d-002590f97d84 

$> git annex init                                                                
init  (merging origin/git-annex into git-annex...)
(recording state in git...)
(scanning for unlocked files...)

  Failed to get annex.uuid configuration of repository origin

  Instead, got: "core.repositoryformatversion\n0\NULcore.filemode\ntrue\NULcore.bare\ntrue\NUL"

  This is unexpected; please check the network transport!
(Auto enabling special remote datalad-archives...)
(Auto enabling special remote inm7-storage...)

  Cannot run git-annex-remote-ria -- It is not installed in PATH (/usr/lib/git-annex.linux/bin:/usr/lib/git-core:/home/yoh/picts/mris/heudiconv-master/venvs/dev3/bin:/home/yoh/gocode/bin:/home/yoh/gocode/bin:/home/yoh/bin:/home/yoh/.local/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/sbin:/usr/sbin:/usr/local/sbin:/usr/lib/git-annex.linux/extra)
ok
(recording state in git...)

"""]]

so two issues in above:
- not clear why it dumps git config if fetched instead of just announcing that remote has no git-annex and set to ignore
- empty lines between all the messages go to stdout:

[[!format sh """
$> git annex init 2>/dev/null
init  (scanning for unlocked files...)



(Auto enabling special remote inm7-storage...)

ok
"""]]

PS ignore "ignores --json-error-messages" part of the subject -- was detected in 7.20190819+git2-g908476a9b-1~ndall+1 during `get` but upgrade to 7.20191114+git43-ge29663773-1~ndall+1 resolved it

[[!meta author=yoh]]
[[!tag projects/datalad]]

> [[fixed|done]] what I consider to be the core issue in this bug report. 
> --[[Joey]]

