Bug#996783: deb822-repro: Paragraph iter yields <class 'debian._util._CaseInsensitiveString'> rather than strings

[Jelmer Vernooij]

Package: python3-debian
Version: 0.1.39
Severity: normal

The new deb822 repro interface paragraph iterator yields objects of type
debian._util._CaseInsensitiveString rather than strings.

This breaks e.g. checks that verify that the name of the field appears in a
list of strings when there are non-lowercase field names:

>>> import debian._util
>>> x = debian._util._CaseInsensitiveString('Oo')
>>> x in set(['Oo'])
False

-- System Information:
Debian Release: bookworm/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 5.10.0-8-amd64 (SMP w/2 CPU threads)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages python3-debian depends on:
ii  python3          3.9.2-3
ii  python3-chardet  4.0.0-1
ii  python3-six      1.16.0-2

Versions of packages python3-debian recommends:
ii  python3-apt  2.2.1

Versions of packages python3-debian suggests:
ii  gpgv  2.2.27-2

-- no debconf information