[Bug 1614708] perldoc warns about binary data depending on TERM variable

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https://bugzilla.redhat.com/show_bug.cgi?id=1614708

Petr Pisar <ppisar@xxxxxxxxxx> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                URL|                            |https://rt.perl.org/Public/
                   |                            |Bug/Display.html?id=131762
           See Also|                            |https://bugzilla.redhat.com
                   |                            |/show_bug.cgi?id=1329059



--- Comment #1 from Petr Pisar <ppisar@xxxxxxxxxx> ---
This looks like an issue in Pod::Perldoc::ToTerm that adds ANSI sequences into
the formatted output according to a current terminal:

E.g. the NAME section title changes:

-ESC[1mNAMEESC[0m
+ESC[1mNAMEESC[m^O

This is saved into a file and a pager, "/usr/bin/less -isr" probably, is called
on that file. In the TERM=linux case /usr/bin/less comes to a conclusion that
the file is a binary garbage and asks for permission to spoil a terminal.

And indeed the TERM=linux output is not propebly displayed on Linux virtual
terminal, an `O' letter hangs after the title. Whether it's a
Pod::Perldoc::ToTerm or a terminal database bug I don't know.

There were numerous bug reports to Pod-Perldoc CPAN distribution, e.g.:

https://rt.cpan.org/Public/Bug/Display.html?id=120229
https://rt.cpan.org/Public/Bug/Display.html?id=88204

and that lead to Perl bug:

https://rt.perl.org/Public/Bug/Display.html?id=131762

that was resolved by patching Pod::Perldoc to use plain text output without
ANSI formatting (i.e. Pod::Perldoc::ToText instead of Pod::Perldoc::ToTerm).

I'm keen to apply the Perl patch to Fedora <= 28. It will disappear the bold
highlighting but it makes the text legible on all terminals.

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