src/keys.c: Fix help strings for generic-{cut,paste}
src/keys.c: Fix help strings for generic-{cut,paste}

Reported-by: rafael ff1 <64414045e70db0478301250b98e7c1b9935d10ad@gmail.com>
Signed-off-by: Lukas Fleischer <af90e31281d8305af43dc616c5aaca3c7165f8a7@cryptocrack.de>

lfos/calcurse,lfos/calcurse,lfos/calcurse