dependency mixup of gnuplot and gnuplot5

[Karl]

the gnuplot package claims to be version 4.6.6, but depends on gnuplot5-qt.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[windowsguy (something-f)]

Not only that, it also runs v5, so it's even worse than just a dependency mix-up.

My Xenial version (as of March 2017):
Linux ubuntu 4.4.0-66-generic #87-Ubuntu SMP Fri Mar 3 15:29:05 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

Repo info is wrong:

gnuplot:
  Installed: 4.6.6-3
  Candidate: 4.6.6-3

And the package is wrong:

user@ubuntu:~/data$ which gnuplot5
/usr/bin/gnuplot5
user@ubuntu:~/data$ which gnuplot
/usr/bin/gnuplot
user@ubuntu:~/data$ gnuplot

        G N U P L O T
        Version 5.0 patchlevel 3 last modified 2016-02-21 <=========== v5.0 started

        Copyright (C) 1986-1993, 1998, 2004, 2007-2016
        Thomas Williams, Colin Kelley and many others

        gnuplot home: http://www.gnuplot.info
        faq, bugs, etc: type "help FAQ"
        immediate help: type "help" (plot window: hit 'h')

Terminal type set to 'qt'