François Pantigny submitted an update to the
nicematrix
package.
Version number: 6.4 2021-11-23 License type: lppl1.3
Summary description: Improve the typesetting of mathematical matrices with PGF
Announcement text: ----------------------------------------------------------------------
New commands OverBrace and UnderBrace in the CodeAfter.
Correction of several bugs. ----------------------------------------------------------------------
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Thanks for the upload.
For the CTAN Team Ina Dau