Request: Improve documentation about \implicantedge

[StickySli]

I have had major headaches trying to understand the documentation of \implicantedge when working on a 4x2 Karnaugh map. I was trying to make a 2x1 implicant across the edge, and i was seriously struggling. I tried doing \implicantedge{0}{2} and \implicantedge{0}{2}{0}{2}, but neither worked. The only one that worked was \implicantedge{0}{0}{2}{2}.

My request is to show an example about a 2x1 (horizontal) and a 1x2 (vertical) implicantedge examples.
My second request is to add a section with common issues, the first being the order of operations. Some commands only work if the cell has not been filled. I also struggled a lot with this.