_format_tag() not in lastgenre plugin anymore

[JOJ0]

Hi,
I'm very sorry, I broke your plugin because I patched out the lastgenre plugin's _format_tag() method in my recent rework. The "title casing" is now simply included in a larger function because it's not used elsewhere:

https://github.com/beetbox/beets/pull/4982/files#diff-f85204832b1e3e76cf854983f1f1773be9f7857d94656cbb3a0f2a0ae6431140R167-R177

What should we do about it? Bringing back the function in lastgenre is one option, the other is you implement it yourself. I see you have a method for it already:

beets-autogenre/beetsplug/autogenre/__init__.py

Lines 332 to 333 in 2161b3d

	def _format_genre(self, genre):
	return self._lastgenre._format_tag(genre)

Sorry and appologize beforehand: I might have broken more things, it was quite a huge refactoring madness going on :-/ I'll report if I find more!