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diff -ur patsy-0.5.1/doc/spline-regression.rst patsy-0.5.1.print/doc/spline-regression.rst
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--- patsy-0.5.1/doc/spline-regression.rst	2015-11-09 06:01:53.000000000 +0100
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+++ patsy-0.5.1.print/doc/spline-regression.rst	2019-02-13 17:40:16.579986365 +0100
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@@ -179,7 +179,7 @@
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       ....:            {"x1": x1.ravel(), "x2": x2.ravel(), "df": df})
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       ....:
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-   In [80]: print y.shape
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+   In [80]: print(y.shape)
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    In [90]: fig = plt.figure()
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