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Alexandre Duret-Lutz authored
Since we now require Python 3.6, we can use f-strings instead of format() to make the code more readable. * doc/org/tut01.org, doc/org/tut02.org, doc/org/tut03.org, doc/org/tut21.org, doc/org/tut24.org, doc/org/tut90.org, python/spot/__init__.py, python/spot/jupyter.py, tests/python/acc.py, tests/python/acc_cond.ipynb, tests/python/complement_semidet.py, tests/python/decompose.ipynb, tests/python/formulas.ipynb, tests/python/highlighting.ipynb, tests/python/ipnbdoctest.py, tests/python/ltlf.py, tests/python/parity.ipynb, tests/python/product.ipynb, tests/python/relabel.py, tests/python/satmin.ipynb, tests/python/stutter-inv.ipynb, tests/python/twagraph-internals.ipynb, tests/python/zlktree.ipynb: Use f-strings.