Re: [PATCHv2] Add --reference option to git submodule.

Michael J Gruber schrieb:

BTW, even dash has "test STRING" so portability doesn't require -n but I
think it's OK either way.

It is not if STRING is user input; it could be, e.g., '-f', and then the
command gives a syntax error because of a missing argument.

It's safer to use test -z and test -n unless the string to test is
completely under the control of the script.

-- Hannes