Add linestyle option for plot_multiple

Sometimes one may wish to use linestyles as well as colors to differentiate results plotted together with plot_multiple. This merge request adds that functionality.

In the process, I found that hist_kwargs and label_kwargs would not update properly in plot_corner, overwriting defaults instead of updating them. This MR now fixes that issue as well.

marked this merge request as draft

added 2 commits

• 988a6dfb - fix contour behavior
• 757c3657 - Fix handling of label_kwargs and hist_kwargs

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For an example of a plot created with these changes:

marked this merge request as ready

changed the description

added 1 commit

• 42b898f9 - pre-commit cleanup

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approved this merge request

Thanks @rhiannon.udall this looks like a neat addition.

approved this merge request

changed milestone to %2.2.0

mentioned in commit b6550cc7

merged