Recent change to Towncrier generation doesn't handle newlines properly

[webknjaz]

@uranusjr I overlooked one thing — it appears that your change adding breaks the title now: https://pip--9805.org.readthedocs.build/en/9805/news/#changelog

Originally posted by @webknjaz in #9805 (comment)

[webknjaz]

@uranusjr ☝️ just documenting this for now but the fix should be trivial — s/-}}/}}/ on the first line of the towncrier template.

[uranusjr]

s/-}}/}}/ on the first line of the towncrier template.

Hmm, that does not seem to work, see #9817.

Still not right: https://pip--9817.org.readthedocs.build/en/9817/news/

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Edit: I think I figured out a solution.

[webknjaz]

Added a link to the upstream template in the PR if you want to use that: https://github.com/twisted/towncrier/blob/master/src/towncrier/templates/default.rst