Merge branch 'fix/ldc-plot-test' into 'master'

Kilian Weishauptrequested to merge
cherry-pick-a117604d into releases/3.3

[examples] Fix plot test on minimal installations

Closes #962 (closed)

See merge request !2360 (merged)

(cherry picked from commit a117604d)

6f2aed1f [examples] Fix plot test on minimal installations

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