Stamps what a legend drew, so the count of marks leaves it out.
A legend icon is painted exactly as the series it stands for -- a bar's
swatch in the bar colour, a line's in the line colour at the line's weight
-- and is drawn after the series, so paint and order both take it for a
mark: a five-bar chart with its legend showing counted six, and the
mismatch dropped its highlighting (#1315). What does tell them apart is
where they are, so everything whose centre lies inside a legend's box is
set aside.
A mark drawn under a legend placed over the plot is set aside with it. The
count then disagrees and the chart reads without an outline, which is the
conservative failure the count check exists to produce.
Stamps what a legend drew, so the count of marks leaves it out.
A legend icon is painted exactly as the series it stands for -- a bar's swatch in the bar colour, a line's in the line colour at the line's weight -- and is drawn after the series, so paint and order both take it for a mark: a five-bar chart with its legend showing counted six, and the mismatch dropped its highlighting (#1315). What does tell them apart is where they are, so everything whose centre lies inside a legend's box is set aside.
A mark drawn under a legend placed over the plot is set aside with it. The count then disagrees and the chart reads without an outline, which is the conservative failure the count check exists to produce.