Provide nice completion for the <c-d> list in vim's commandline list
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autoload
plugin
README
addon-info.json

README

complete <tab> options in commandline in a sane way.
Usage: :h if_<c-n> to get a list to select one of the matches found by <c-d>

related work:
https://github.com/emma-dev/dragee.vim/blob/master/core/command_line.complete.vim
There was another plugin I forgott the name of which did almost the same ..

TODO: fix escaping ..