[Bug 1012398] Re: Spurious "W: You may want to run apt-get update to correct these problems" when "Duplicate sources.list entry" is only warning

[Monsta]

Yes, this warning is totally useless because apt-get update won't
magically remove the duplicates.

Actually, apt is full of strange messages that are completely unclear to
the users (like "you have held broken packages" when nothing is actually
being held). This is just one of them.

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https://bugs.launchpad.net/bugs/1012398

Title:
  Spurious "W: You may want to run apt-get update to correct these
  problems" when "Duplicate sources.list entry" is only warning

Status in “apt” package in Ubuntu:
  Confirmed

Bug description:
  If you create duplicate lines in sources.list, and then run apt-get
  update, you receive something like this:

  W: Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ precise-security/multiverse amd64 Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_precise-security_multiverse_binary-amd64_Packages)
  W: Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ precise-security/multiverse i386 Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_precise-security_multiverse_binary-i386_Packages)
  W: You may want to run apt-get update to correct these problems

  The final warning is not helpful.

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