bug#24450: bug#33569: Missing sanitizing of '[]' in pypi-importer

[Maxim Cournoyer <maxim.cournoyer@gmail.com>]

swedebugia <swedebugia@riseup.net> writes:

> E.g.
> sdb@komputilo ~/guix-tree$ ~/guix-tree/pre-inst-env guix import pypi
> snakemake
> ...
>   (propagated-inputs
>     `(("python-[reports]"
>        ,#{python-\x5b;reports\x5d;}#)
>       ("python-appdirs" ,python-appdirs)
> ...

This one now gives (local branch):

--8<---------------cut here---------------start------------->8---
./pre-inst-env guix import pypi snakemake

Starting download of /tmp/guix-file.4XvWMX
From https://files.pythonhosted.org/packages/4a/aa/aab1515d220be06fbdccf3c89335d9585b08ac6be74b8e3c9e8c3c32798e/snakemake-5.4.4.tar.gz...
 ….4.4.tar.gz  169KiB                 723KiB/s 00:00 [##################] 100.0%
(package
  (name "python-snakemake")
  (version "5.4.4")
  (source
    (origin
      (method url-fetch)
      (uri (pypi-uri "snakemake" version))
      (sha256
        (base32
          "0prpr5qajqwr8sh4gzggpj8l4np2rcm9nfdzvcp30d5yw7h26wqm"))))
  (build-system python-build-system)
  (propagated-inputs
    `(("python-appdirs" ,python-appdirs)
      ("python-configargparse" ,python-configargparse)
      ("python-datrie" ,python-datrie)
      ("python-docutils" ,python-docutils)
      ("python-gitpython" ,python-gitpython)
      ("python-jsonschema" ,python-jsonschema)
      ("python-pyyaml" ,python-pyyaml)
      ("python-ratelimiter" ,python-ratelimiter)
      ("python-requests" ,python-requests)
      ("python-wrapt" ,python-wrapt)))
  (home-page "http://snakemake.bitbucket.io")
  (synopsis
    "Snakemake is a workflow management system that aims to reduce the complexity of creating workflows by providing a fast and comfortable execution environment, together with a clean and modern specification language in python style. Snakemake workflows are essentially Python scripts extended by declarative code to define rules. Rules describe how to create output files from input files.")
  (description
    "Snakemake is a workflow management system that aims to reduce the complexity of creating workflows by providing a fast and comfortable execution environment, together with a clean and modern specification language in python style. Snakemake workflows are essentially Python scripts extended by declarative code to define rules. Rules describe how to create output files from input files.")
  (license license:expat))
--8<---------------cut here---------------end--------------->8---