[Bug 1833124] [NEW] dh_installman ruins man pages on Minimal Ubuntu

[Robin Gustafsson]

Public bug reported:

`dh_installman` uses the `man` program to convert man pages to UTF-8. On
Minimal Ubuntu images (18.10 and above), /usr/bin/man is replaced by a
shell script outputting a notice about the lack of man pages and the
option to "unminimize" the image. Thus, instead of recoding the man
pages, it replaces all man pages with this output.

See for example this bug reported against Docker:
<https://github.com/docker/for-linux/issues/639>

This has been observed on the minimal versions of cosmic and disco, but
is likely equally applicable to the minimal version of eoan since it,
too, includes the /usr/bin/man replacement.

** Affects: debhelper (Ubuntu)
     Importance: Undecided
         Status: New

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Title:
  dh_installman ruins man pages on Minimal Ubuntu

Status in debhelper package in Ubuntu:
  New

Bug description:
  `dh_installman` uses the `man` program to convert man pages to UTF-8.
  On Minimal Ubuntu images (18.10 and above), /usr/bin/man is replaced
  by a shell script outputting a notice about the lack of man pages and
  the option to "unminimize" the image. Thus, instead of recoding the
  man pages, it replaces all man pages with this output.

  See for example this bug reported against Docker:
  <https://github.com/docker/for-linux/issues/639>

  This has been observed on the minimal versions of cosmic and disco,
  but is likely equally applicable to the minimal version of eoan since
  it, too, includes the /usr/bin/man replacement.

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