Feature: expand format to allow for expansion of xlables and ylabels similar to how titles is run

[cvanelteren]

Titles can be passed as lists, but xlabel will pass it on to all axes. This creates a disconnect when we format with one call when we have non-shared axes. This should be changed.

For example

axs.format(titles = [..], xlabel = [..])

will split the titles to the available axes but not work for xlabel(etc).

[gepcel]

I like this. I had been hesitating for a long time about whether to propose this.