* Add the Upstream-Contact field.
 * Update contribution years.
 * Mention me in paragraph about the debian/ folder.

 * Rename debian-watch-may-check-gpg-signature to debian-watch-does-not-check-gpg-signature.
 * Maks unusual-interpreter for Python.

If for any reason tmux failed, reveal the error raising a subprocess exception.
This makes debugging a lot easier. If something goes wrong, for instance tmux
session is not started, we will see stack trace, command arguments as an
array, and all output. However, the output is printed in a mess with unittest
messages, but it is okay.

Furthermore, the Python documentation cautions against using stdout=PIPE or
stderr=PIPE with the call() function.

More accurate check does not imply NeoVim. It has got working autotrigger feature.

Note, print with parentheses and single argument produce the same output in old Python.

 * Add field Rules-Requires-Root: no into the debian/control file.
 * Use secure URL in the Format field in the debian/copyright file.

So dh_python3 will not replace shebang and thus Lintian will not emit the
"python2-script-but-no-python2-dep" error. This shebang is unneeded, though.

Rely on dh-sequence-* virtual packages.

 * Remove maintainer scripts that call to vim-addon-manager.
 * Remove YAML description of the plugin.

Closes: #982604

They get removed by dpkg if they are emtpy during package removal. This covers
the case when vim-ultisnips is the only installed addon in vim-addon-manager and
prevents unowned directories. (Closes: #810695)

This ensures that compiled Python byte code files are present when symlinks are
created.