Core changelog generator erroneously strips hyphens

[basil]

Jenkins and plugins versions report

Jenkins: 2.395

What Operating System are you using (both controller, and any agents involved in the problem)?

Ubuntu 22.04.2 LTS x86_64

Reproduction steps

jenkinsci/jenkins#7679 contained the following proposed changelog entry:

The stop-builds command did nothing if the last build of the job was already finished, even while earlier builds were running.

Expected Results

The punctuation of the above proposed changelog should be retained in the final changelog.

Actual Results

jenkins-infra/jenkins.io#6124 contained this entry, without the hyphen:

The stopbuilds command did nothing if the last build of the job was already finished, even while earlier builds were running.

Anything else?

This is caused by #26, which removes all hyphens (not just hyphens at the beginning of each line, as was the original intention).