- Added support for optional arguments on the command line. If the user is requesting completions in a slot which could be an optional argument, they will receive suggestions for that optional argument, any following optional arguments and the first non-optional argument.
This is used to help with the +modifier completion which is the first non-trailing optional argument that we
have to provide completion for. This update is required for the completion system to work correctly if you have
a version of nrfutil which supports the +modifier functionality.