No error when module specification is "@"

[xdelaruelle]

When the module specification passed for instance to a module load command is equal to @ and advanced_version_spec is enabled, no error is reported and module specification is ignored.

$ module -V
Modules Release 4.6.0 (2020-09-16)
$ module load @
ERROR: Unable to locate a modulefile for '@'
$ module config advanced_version_spec 1
$ module load @
$ module load @ foo
ERROR: Unable to locate a modulefile for 'foo'
$ ml @
$ ml @ foo
ERROR: Unable to locate a modulefile for 'foo'

As @ is an incorrect specification, as no module name is defined, an error should be reported.