Fix serializer block with anchors, remove trailing slash before the anchor

[sneridagh]

@davisagli we overlooked this one :( the roundtrip was bugged because of the trailing slash. Please take a look at the regex, if it's fine like this.

[netlify]

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[mister-roboto]

@sneridagh thanks for creating this Pull Request and helping to improve Plone!

TL;DR: Finish pushing changes, pass all other checks, then paste a comment:

@jenkins-plone-org please run jobs

To ensure that these changes do not break other parts of Plone, the Plone test suite matrix needs to pass, but it takes 30-60 min. Other CI checks are usually much faster and the Plone Jenkins resources are limited, so when done pushing changes and all other checks pass either start all Jenkins PR jobs yourself, or simply add the comment above in this PR to start all the jobs automatically.

Happy hacking!

[sneridagh]

@jenkins-plone-org please run jobs

[tisto]

LGTM. However I'd like @davisagli to have a second look at it.

[davisagli]

@jenkins-plone-org please run jobs

[davisagli]

I added a related fix for the deserializer too. Checking what jenkins says...

[tisto]

@davisagli @sneridagh released with https://pypi.org/project/plone.restapi/9.4.2/#section-1.