"csvtk sep -H -N N --drop" output can be incorrect

[tetedange13]

Prerequisites

• [x] make sure you're are using the latest version by csvtk version
• [x] read the usage

Describe your issue

• [x] describe the problem

csvtk sep --no-header-row --num-cols N --drop does not work correctly when 1 row of column to be separated has (strictly) more fields than --num-cols

• [x] provide a reproducible example

  
  $ echo -e "gender,name\nmale,A;B;C;D\nfemale,a;b;c;d" |
  csvtk pretty
  gender   name
  ------   -------
  male     A;B;C;D
  female   a;b;c;d

INCORRECT :

$ echo -e "gender,name\nmale,A;B;C;D\nfemale,a;b;c;d" | csvtk del-header | csvtk sep -f 2 -s ';' --num-cols 3 --no-header-row --drop | csvtk pretty -H male A;B;C;D A B C D female a;b;c;d a b c d

<br>

Output is correct if 1st row has a number of fields to separate equal (or less) than `--num-cols` :

CORRECT :

$ echo -e "gender,name\nmale,A;B;C\nfemale,a;b;c;d" | csvtk del-header | csvtk sep -f 2 -s ';' --num-cols 3 --no-header-row --drop | csvtk pretty -H male A;B;C A B C female a;b;c;d a b c

### Thank you

I'm grateful to users who have greatly helped to report bugs and suggested new features.

I may respond to issues or fix bugs quickly, but I usually implement new features periodically (two or more weeks).

[shenwei356]

Sorry for the late reply. It's a previously reported bug, and it's fixed then. #218

I've just tested your test data, it works as expected.