[Bug 2020812] Re: Unable to change color highlight in apt output

[Julian Andres Klode]

I think you need to url encode the sequence, but not sure. I don't think
there's anything we can do here about handling backslashes, the problem
is backspaces do happen in actual config items and we can't introduce a
behavior change for them as that would cause regressions.

You should be free to also printf the actual special character into the
config option or the command line argument.

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Title:
  Unable to change color highlight in apt output

Status in apt package in Ubuntu:
  New

Bug description:
  Ubuntu Release:
  lsb_release -rd
  Description:	Ubuntu 22.04.2 LTS
  Release:	22.04

  Source package and version:
  dpkg-query -W apt
  apt	2.4.9

  Binary apt command has support for color output on some commands such
  as "apt list <packagename>" Where enabled the default color output is
  unbolded green color. This is due to the apt configuration item,
  APT::Color::Highlight being set to the default ANSI color code of
  "\x1B[32m", Setting it to another ANSI code should alter the apt
  output.

  Expectation:Setting the Highlight configuration option to another ANSI
  code should alter the apt output to the specified color code.

  $ apt list apt -o apt::color::highlight="\x1b[31m" should set the
  highlighted package name to an unbold red color.

  What happens:
  $ apt list apt -o apt::color::highlight="\x1b[31m"
  Listing... Done
  \x1b[31mapt/jammy-updates,now 2.4.9 amd64 [installed,automatic]
  \x1b[31mapt/jammy-updates 2.4.9 i386

  Prepends literal string of \x1b[31m instead of producing colored
  output.

  "\033[31m" doesn't work either.

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