CTAN update: l3experimental

[CTAN Announcements]

The LaTeX Team  submitted an update to the

                l3experimental

package.

Version number: 2021-08-27
License type: lppl1.3c

Summary description: Experimental LaTeX3 concepts

Announcement text:
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## [2021-08-27]

### Changed
- Track message changes in `l3kernel`

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This package is located at
   https://mirrors.ctan.org/macros/latex/contrib/l3experimental

More information is at
   https://www.ctan.org/pkg/l3experimental


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   Thanks for the upload.

     For the CTAN Team
    Manfred Lotz


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