(maint) Remove space before arg parens warnings

This removes the warnings we get thrown due to space before arg parens:

tasks/tickets.rake:36: warning: don't put space before argument parentheses
tasks/tickets.rake:37: warning: don't put space before argument parentheses
tasks/tickets.rake:38: warning: don't put space before argument parentheses
tasks/tickets.rake:39: warning: don't put space before argument parentheses

Signed-off-by: Ken Barber <ken@bob.sh>