Error when parsing tag containing "-"

[peritus]

Originally reported by @thomasf in #43:

---

Ive started to try it out now, I copied the bumpversion.cfg config from this project and it does not work..
I did leave autocommit there so there was an 2.0.0-dev release tag created and thats where things started to go wrong.

The hypen in the -dev tag messes up a string split you have in the latest_tag_info function.

A slightly modified snippet with logging:

  def latest_tag_info(cls):
        try:
            # git-describe doesn't update the git-index, so we do that
            subprocess.check_output(["git", "update-index", "--refresh"])

            # get info about the latest tag in git
            describe_out = subprocess.check_output([
                "git",
                "describe",
                "--dirty",
                "--tags",
                "--long",
                "--abbrev=40",
                "--match=v*",
            ], stderr=subprocess.STDOUT
            ).decode().split("-")
        except subprocess.CalledProcessError:
            # logger.warn("Error when running git describe")
            return {}

        info = {}

        print describe_out
        if describe_out[-1].strip() == "dirty":
            info["dirty"] = True
            describe_out.pop()

        print describe_out
        info["commit_sha"] = describe_out.pop().lstrip("g")
        print describe_out
        info["distance_to_latest_tag"] = int(describe_out.pop())
        print describe_out
        info["current_version"] = describe_out.pop().lstrip("v")

        print describe_out
        # assert type(info["current_version"]) == str
        assert 0 == len(describe_out)

and output

 a01@whale¤%&! bumpversion 
[u'v2.0.0', u'dev', u'2', u'gf176a005e91bfb3addee4cdf096a90fd34f4287a\n']
[u'v2.0.0', u'dev', u'2', u'gf176a005e91bfb3addee4cdf096a90fd34f4287a\n']
[u'v2.0.0', u'dev', u'2']
[u'v2.0.0', u'dev']
[u'v2.0.0']
Traceback (most recent call last):
  File "/home/a00001/.virtualenvs/default/bin/bumpversion", line 9, in <module>
    load_entry_point('bumpversion==0.5.0', 'console_scripts', 'bumpversion')()
  File "/home/a00001/.virtualenvs/default/local/lib/python2.7/site-packages/bumpversion/__init__.py", line 652, in main
    vcs_info.update(vcs.latest_tag_info())
  File "/home/a00001/.virtualenvs/default/local/lib/python2.7/site-packages/bumpversion/__init__.py", line 148, in latest_tag_info
    assert 0 == len(describe_out)
AssertionError