Included is a patch to change the behavior when legend() is called with
numpoints less than or equal to 0. Currently if one makes such a call, some
cryptic error messages are printed out and the plot is not generated.
The included patch produces a warning, and defaults to using numpoints = 4, so
When using the PostScript backend, and plotting several lines with the same
call to plot (or when plotting a LineCollection), kwargs are applied to the
first line only, and not to every line.
Included is a minimal script that exhibits this problem. The saved figure shows
only one thick red line
