mandoc: invalid.in:9:2: WARNING: skipping empty request: define
mandoc: invalid.in:15:2: WARNING: skipping empty request: define bruch
mandoc: invalid.in:21:2: WARNING: skipping empty request: undef
mandoc: invalid.in:27:2: WARNING: skipping empty request: tdefine
mandoc: invalid.in:33:2: WARNING: skipping empty request: tdefine