make tinyplot_add compatible with do.call(tinyplot)#504

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zeileis wants to merge 3 commits intomainfrom

tinyplot_add_fix

Commits on Oct 6, 2025

.last_call of tinyplot is now determined based on the last call of a function equivalent to the tinyplot() generic as this also works with do.call()
zeileis
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add NEWS item for .last_call fix
zeileis
committed
test case for using tinyplot_add() after do.call(tinyplot)
zeileis
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