Possible regression between 0.9.1 and 0.9.2 (time series)

[Valentin-Laurent]

The last image of the tutorial for time series is different between v0.9.1 and v0.9.2 and above. This may be due to a regression, a bugfix, or a different random state. Links:

• 0.9.1
• 0.9.2
• stable (1.0.1)