Remove extra characters from diff-config command
!1274 (merged) introduced gitlab-ctl diff-config
command.
This is a git diff of the two files so they contain +
and -
to describe additions and removals in between the files.
It is expected that some users will copy those chars which will break gitlab-ctl reconfigure
.
We should remove +
and -
from the output of that command before we print the results.