File psl-1983/3-1/doc/nmode/nm-mark.key artifact f7fb3d3c1d part of check-in trunk

.silent_index {C-X} idx 10-1
.silent_index {C-@} idx 10-1
.silent_index {C-Space} idx 10-1
.silent_index {C-X} idx 10-1
.silent_index {M-@} idx 10-2
.silent_index {C-M-@} idx 10-2
.silent_index {C->} idx 10-2
.silent_index {C-<} idx 10-2
.silent_index {M-H} idx 10-2
.silent_index {C-M-H} idx 10-2
.silent_index {C-X} idx 10-2
.silent_index {C-U} idx 10-2
.silent_index {C-U} idx 10-2