Variables available in templates

[hynek]

This is a bit of a two part problem:

Firstly: I can't find any docs on what variables are available in changelog templates and what they mean. I would say that would belong somewhere into https://towncrier.readthedocs.io/en/latest/customization/index.html and the data is available here:

towncrier/src/towncrier/_builder.py

Lines 310 to 318 in 9554985

	res = jinja_template.render(
	render_title=render_title,
	sections=data,
	definitions=definitions,
	underlines=underlines,
	versiondata=versiondata,
	top_underline=top_underline,
	get_indent=get_indent, # simplify indentation in the jinja template.
	)

---

Secondly: after reading that and finding what I needed (versiondata), it seems a bummer that variables that work in title_format don't work in templates. Since I want to write a smart template that does certain things if the versions is "UNRELEASED", I want to set my title myself. I think there should be symmetry here.