Removes odd double background color for typical code markup

[mstahv]

Code snippets in Vaadin apps look weird without this fix. @jouni says this fixes them all 💪

Example:

That kind of html is generated by e.g. all markdown generators

Type of change

• Bugfix
• Feature

Checklist

• I have read the contribution guide: https://vaadin.com/docs/latest/contributing/overview
• I have added a description following the guideline.
• The issue is created in the corresponding repository and I have referenced it.
• I have added tests to ensure my change is effective and works as intended.
• New and existing tests are passing locally with my change.
• I have performed self-review and corrected misspellings.
• I have not completed some of the steps above and my pull request can be closed immediately.

[mstahv]

I don't see any dot, what the heck is that complaint 🤷‍♂️

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[mstahv]

Apparently

`.`

means space.

[mstahv]

Please get this fixed before the next minor, I wouldn't be surprised if somebody considers this a breaking change.

In related discussions, getting rid of the whole gray background might make sense as well (and then this change would be obsoleted). As such it sometimes causes mediocore results, even if used alone wiht only pre element:

[web-padawan]

LGTM. I think we can consider this as behavior altering fix.

[vaadin-bot]

This ticket/PR has been released with Vaadin 24.5.0.alpha1 and is also targeting the upcoming stable 24.5.0 version.