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Fix ar1_turningpts build: drop figsize from az.plot_trace (#930)

arviz 1.x dropped the figsize kwarg on plot_trace, which raises ValueError and fails notebook execution once the build cache is invalidated. Remove figsize from the az.plot_trace call (arviz uses its default size). Verified against arviz 1.2.0 that plot_trace(idata) and trace.posterior.rho access both still work. Closes #929 Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

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Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -328,7 +328,7 @@ def draw_from_posterior(sample):`
`328`	`328`
`329`	`329`	`# check condition`
`330`	`330`	`with AR1_model:`
`331`		`- az.plot_trace(trace, figsize=(17, 6))`
	`331`	`+ az.plot_trace(trace)`
`332`	`332`
`333`	`333`	`rhos = trace.posterior.rho.values.flatten()`
`334`	`334`	`sigmas = trace.posterior.sigma.values.flatten()`