Tests

DOC: document fmt_xdata, fmt_ydata, and fmt_zdata #29529

Job	Run time
Python 3.13 on ubuntu-22.04 (Extra TeX packages)	18m 53s
Python 3.13t on ubuntu-22.04 Free-threaded	17m 36s
Python 3.12 on ubuntu-22.04-arm	11m 43s
Python 3.11 on ubuntu-22.04	16m 8s
Python 3.12 on ubuntu-24.04	17m 13s
Python 3.11 on ubuntu-22.04 (Minimum Versions)	17m 50s
Python 3.13 on macos-14	16m 25s
Python 3.11 on macos-13	22m 38s
Python 3.12 on macos-14	21m 45s
Create issue on failure	0s
	2h 40m 11s

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