[CTIS] Make `split_options` return list of character missing if all input values are `NA`#1446

Merged

krivard merged 3 commits intomainfrom

splitoptions-robust-na

Jan 10, 2022

Commits on Jan 3, 2022

split_options returns NA if all input is NA
nmdefries
committed

Commits on Jan 4, 2022

remove na-checking logic
nmdefries
committed

Commits on Jan 5, 2022

make split_options input and output more regular
nmdefries
committed