Use rc() less often in examples/tutorials. #16578
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If a user learns rcParams.update / dict.update, they'll know how to
merge any dicts, whereas rc() is a matplotlib-specific API which is
hardly shorter (and needing star-unpacking in the case of
tutorials/text/usetex.py, which makes things worse overall).
Also it's often better to just pass the argument to the single
function call (
text(..., usetex=True)
,imshow(..., origin="lower")
)which avoids unnecessarily touching global state.
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