Clarify docstring for rest_call.
Clarify docstring for rest_call.

Be a bit more explicit about this; it's implied by the following
paragraph, but this is perhaps clearer.

henn/haas,henn/hil,henn/hil_sahil,kylehogan/hil,kylehogan/haas,meng-sun/hil,henn/hil_sahil,CCI-MOC/haas,kylehogan/hil,SahilTikale/haas,meng-sun/hil,henn/hil