@iftex
@macro e{a}
(@email{\a\})
@end macro
@end iftex
@ifnottex
@macro e{a}
@email{\a\}
@end macro
@end ifnottex

@iftex
@macro xrm{}
@rm{}
@end macro
@end iftex
@ifnottex
@macro xrm{}
@end macro
@end ifnottex

@iftex
@macro xtt{}
@tt{}
@end macro
@end iftex
@ifnottex
@macro xtt{}
@end macro
@end ifnottex