Missing space in tooltips leads to wrong numbers number

[ponychicken]

Bug description

If you do a graph where in the tooltip a value is being reported there is now space before the value.
In the screenshot its should be count: 5, 0.4% but what the users sees is count50.4%

Screenshots/recordings

Superset version

master / latest-dev

Python version

3.9

Node version

16

Browser

Chrome

Additional context

No response

Checklist

• I have searched Superset docs and Slack and didn't find a solution to my problem.
• I have searched the GitHub issue tracker and didn't find a similar bug report.
• I have checked Superset's logs for errors and if I found a relevant Python stacktrace, I included it here as text in the "additional context" section.

[dosubot]

Hi @ponychicken! I'm Dosu and I’m helping the superset team.

This is a known regression in Superset, caused by a frontend XSS filter that stripped whitespace and styles from tooltip HTML, leading to concatenated text like count50.4%. The issue affects multiple chart types and is tracked in several issues (#33865, #33913, #34030, #34198, #35120, #35719). A fix was merged in PR #34018 and is present on the master branch, restoring proper tooltip formatting and spacing by updating the XSS filter to allow style attributes on table elements and preserving whitespace ref.

If you are still seeing this issue on master, try a hard refresh or clear your frontend build cache. For older versions, a temporary workaround is to add custom CSS like table * { padding: 5px; } to your dashboard, or to customize the tooltip formatter in the relevant chart's transformProps.ts file to add explicit spaces or punctuation between values ref.

You can track progress and technical details in the linked issues and PR.

To reply, just mention @dosu.

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[ponychicken]

ok literally first time a bot was helpful!