fix v:count on repeat
change behavior: s:get_block_append
refactor: add s:is_valid_config()
canceled message
changed append-reg behavior when set register
add undoj in replace
up complete_reg()
add config.complete
refactor: use s:get_conf in s:get_pair_from_key
add support_delete/replace
refactor
add doc/jax
fix s:get_val()
fix: s:get_inputstr()