regress/eqn/define/invalid.out_lint

   1 mandoc: invalid.in:10:2: WARNING: skipping empty request: define
   2 mandoc: invalid.in:16:2: WARNING: skipping empty request: define bruch
   3 mandoc: invalid.in:22:2: WARNING: skipping empty request: undef
   4 mandoc: invalid.in:28:2: WARNING: skipping empty request: tdefine
   5 mandoc: invalid.in:34:2: WARNING: skipping empty request: tdefine