scrub null byte into empty cell

[seamusabshere]

null bytes are treated as valid data

feature request: by default or with an option, convert them into emptiness

i tried to use --null but (at least in ruby) you can't pass a null byte into a command

irb(main):007:0> NULL = ["\x0"]
=> ["\u0000"]

irb(main):008:0> NULL_REGEXP = "\\s*(\\s+|" + NULL.map { |x| Regexp.escape(x) }.join('|') + ")\\s*"                                                                                                       (irb):8: warning: already => "\\s*(\\s+|\u0000)\\s*"

irb(main):009:0> system({},"scrubcsv --clean-column-names --trim-whitespace --replace-newlines --null #{Shellwords.escape NULL_REGEXP}",in: 'null.csv',out: 'null.out.csv',)
Traceback (most recent call last):
        5: from /usr/bin/irb:23:in `<main>'
        4: from /usr/bin/irb:23:in `load'
        3: from /Library/Ruby/Gems/2.6.0/gems/irb-1.0.0/exe/irb:11:in `<top (required)>'
        2: from (irb):9
        1: from (irb):9:in `system'
ArgumentError (string contains null byte)