Support facet formulas y~1 and 1~x for 1-column or 1-row layouts#562

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zeileis wants to merge 2 commits intomainfrom

Commits on Mar 24, 2026

tinyframe() returns a zero-column data frame now (and not NULL), if a formula part contains no variables (e.g., just a constant)
zeileis
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handle facet = y ~ 1 or 1 ~ x formulas
zeileis
committed