Discrepancy in window sizes depending on how they are given

[thekugelmeister]

For single read loading, if I request windows that I expect to be the same size, I observe them to be different depending on how they are requested.

• If I create a bed file with windows of length w, the function returns the expected window boundaries for each read: n to n+w+1
• If I pass w as the window_size argument, the function returns a window that is smaller by a single base: n to n+w

To solve this

• ensure we are consistent with inclusivity of the right window bound across the entire codebase
• ensure this is clearly documented everywhere