Fix some issues reported by lintian

Janitorrequested to merge
janitor-bot/git-annex:lintian-fixes into master

Fix some issues reported by lintian

  • Trim trailing whitespace.
  • Use secure copyright file specification URI.
  • Use secure URI in Homepage field.
  • Bump debhelper from old 9 to 12.
  • Set debhelper-compat version in Build-Depends.
  • debian/copyright: use spaces rather than tabs to start continuation lines.
  • Remove unnecessary XS-Testsuite field in debian/control.
  • Rely on pre-initialized dpkg-architecture variables.

This merge proposal was created automatically by the Janitor bot (https://janitor.debian.net/lintian-fixes).

You can follow up to this merge proposal as you normally would.

Build and test logs for this branch can be found at https://janitor.debian.net/lintian-fixes/pkg/git-annex/51cd326b-301b-423e-942e-8acaf8808f17.

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