[Bug 1027519] Re: add-apt-repository doesn't check entries in /etc/apt/sources.list.d/ causes duplicate software sources

[林博仁(Henry Lin)]

After viewing its manpage I found this is maybe designed to be, so
invalid.

** Changed in: software-properties (Ubuntu)
       Status: Confirmed => Invalid

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Title:
  add-apt-repository doesn't check entries in /etc/apt/sources.list.d/
  causes duplicate software sources

Status in “software-properties” package in Ubuntu:
  Invalid

Bug description:
  Hi 
  I found that add-apt-repository doesn't check for duplicate software sources located in /etc/apt/sources.list.d/ , causes reinstalling sources of some Debian packages that configure itself's software sources in sources.list.d/ like google-chrome and dropbox producing duplicate source lines.

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