incorrect quoting of commands

[Roland Freikamp]

Dear All,

parallel uses terribly incorrect quoting for its commands.

Examples:
1.  $ echo 1 | parallel bash -c 'echo hi; echo ho {};'
    Academic tradition requires you to cite works you base your article on.
    If you use programs that use GNU Parallel to process data for an article in 
a
    scientific publication, please cite:

      Tange, O. (2020, August 22). GNU Parallel 20200822 ('Beirut').
      Zenodo. https://doi.org/10.5281/zenodo.3996295

    This helps funding further development; AND IT WON'T COST YOU A CENT.
    If you pay 10000 EUR you should feel free to use GNU Parallel without 
citing.

    More about funding GNU Parallel and the citation notice:
    https://www.gnu.org/software/parallel/parallel_design.html#Citation-notice

    To silence this citation notice: run 'parallel --citation' once.

    Come on: You have run parallel 11 times. Isn't it about time
    you run 'parallel --citation' once to silence the citation notice?


    ho 1
  The correct output would be:
    hi
    ho 1

2.  $ echo 1 | parallel bash -c 'myvar="hello"; echo $myvar {};'
    Academic tradition requires you to cite works you base your article on.
    If you use programs that use GNU Parallel to process data for an article in 
a
    scientific publication, please cite:

      Tange, O. (2020, August 22). GNU Parallel 20200822 ('Beirut').
      Zenodo. https://doi.org/10.5281/zenodo.3996295

    This helps funding further development; AND IT WON'T COST YOU A CENT.
    If you pay 10000 EUR you should feel free to use GNU Parallel without 
citing.

    More about funding GNU Parallel and the citation notice:
    https://www.gnu.org/software/parallel/parallel_design.html#Citation-notice

    To silence this citation notice: run 'parallel --citation' once.

    Come on: You have run parallel 15 times. Isn't it about time
    you run 'parallel --citation' once to silence the citation notice?

    1
  The correct output would be:
    hello 1


The reason seems that
    bash -c 'echo hi; echo ho {};'
is incorrectly converted by parallel to
    bash -c 'bash -c echo hi; echo ho {};'
which is effectively
    bash -c echo hi
    bash -c 'echo ho {}'


best regards
Roland