Man pages matching name trf_flipregisterlong in section 3:

Trf_FlipRegisterLong.3.en	debian 10 / tcl-trf-doc
Trf_FlipRegisterLong.3.en	debian 11 / tcl-trf-doc
Trf_FlipRegisterLong.3.en	debian 12 / tcl-trf-doc
Trf_FlipRegisterLong.3.en	debian 13 / tcl-trf-doc