notebooks: correction of typos
* tests/python/_partitioned_relabel.ipynb,
tests/python/_product_weak.ipynb,
tests/python/acc_cond.ipynb,
tests/python/aliases.ipynb,
tests/python/automata.ipynb,
tests/python/cav22-figs.ipynb,
tests/python/contains.ipynb,
tests/python/decompose.ipynb,
tests/python/formulas.ipynb,
tests/python/games.ipynb,
tests/python/highlighting.ipynb,
tests/python/ltsmin-dve.ipynb,
tests/python/parity.ipynb,
tests/python/product.ipynb,
tests/python/satmin.ipynb,
tests/python/stutter-inv.ipynb,
tests/python/synthesis.ipynb,
tests/python/twagraph-internals.ipynb,
tests/python/word.ipynb,
tests/python/zlktree.ipynb: here
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