Changes the test command to check if args contains a single path and
wraps it in a list. Now a test thread can be started without providing
a list:
-test %/tests/lib
And passing a list still works:
test %/tests/lib ~
One nit in this change is the lark expression to reach into args: if
args is ~ then instead of getting a useful need/have error, the test
ends in a "false-start". Perhaps this could be fixed by detecting ~
and setting it to %/tests.
Unflops the spur in +en-beam, +de-beam, and everything that calls either
of those, or works with the consequences of their output.
This includes clay's interface for mounting and unmounting, which now
no longer expects the arguments to contain an old-style spur.
