github-release command includes anchor of previous version

[Rodrigo Girão Serrão]

When creating/updating releases with scriv github-release, the release description contains the anchor of the previous release.

I will gladly tackle this, provided you are not in a hurry to fix this; otherwise, go ahead.

[Ned Batchelder]

Can you show me what you mean? I haven't noticed this in my uses: https://github.com/nedbat/dinghy/releases

[Rodrigo Girão Serrão]

My CHANGELOG.md (note, it's a markdown changelog collected from markdown fragments) starts like this:

# Changelog

<!--scriv-insert-here-->

<a id='changelog-0.1.2'></a>
# 0.1.2 — 2022-06-30

## Added

- 100% code coverage.
- Code coverage reporting to tox.
- Tests to cover encoding and decoding that fails.

<a id='changelog-0.1.1'></a>
# 0.1.1 — 2022-06-25

## Added

- ...

My 0.1.2 release notes look like this;

## Added

- 100% code coverage.
- Code coverage reporting to tox.
- Tests to cover encoding and decoding that fails.

<a id='changelog-0.1.1'></a>

It looks like the changelog is just being truncated in the wrong place. My 0.1.1 release exhibits the same issue (it contains the anchor for the 0.1.0 heading).
However, these anchors are not visible in the release, only when you try to edit the release notes.

[Ned Batchelder]

This is fixed in commit 31b8a4b.

[Ned Batchelder]

This is now released as part of scriv 0.16.0.