misleading tutorial figure of reldist

[xzhuo]

Now a bug in the code, but I found the figure explaining the process misleading. With the command bedtools reldist -a a.bed -b b.bed, the a.bed will be used as the B (orange) feature in the image, while the b.bed file will be used as the A (blue) intervals in the image:

I think flipping the blue and orange intervals from the picture would help.

Thanks for providing so many cool features (I stumbled upon this feature by reading the bedtools tutorials for fun)!

-Xiaoyu