multiple line style for quantiles

[jhshinn]

I want to thank the author first for the excellent tool, corner.py.
It does help me a lot plotting MCMC results.

I usually plot five quantiles: median, 1-sigma, and 2-sigma. So, it is not easy to catch the median immediately when seeing the histograms since all the quantiles are indicated with dashed lines.
It will be great if corner.py provides an option to set the line style of quantiles;
for example, quantiles=[0.16, 0.5, 0.84], q_ls=['dotted', 'dashed', 'dotted']

Thanks in advance for your consideration-

[sahiljhawar]

I didn't realise that issue author already had a pull request with the same functionality.

[sahiljhawar]

I just wanted to do start with opensource, and since corner is more or less a daily part of my work. So I thought this would be good place to start.