Fix issue when crop start == cell length of a Strip

[darrenburns]

When the start of the crop window aligned perfectly with the end of the Strip, the entire Strip was incorrectly being returned

Before this change:

Strip([Segment("foo")]).crop(3, 8) == Strip([Segment("foo")]) 🔴 
Strip([Segment("foo")]).crop(4, 8) == Strip([]) 🟢 

After this change:

Strip([Segment("foo")]).crop(3, 8) == Strip([]) 🟢 
Strip([Segment("foo")]).crop(4, 8) == Strip([]) 🟢 

[rodrigogiraoserrao]

Thanks for the emoji semaphore lights.
As someone who identifies both as a millenial and as a Gen Z, the Gen Z in me appreciates the clearly colour-coded examples.
Also, I'm afraid these emoji might not be inclusive for colourblind people.
I recommend ✅❌ the next time.

[darrenburns]

Thanks for the emoji semaphore lights. As someone who identifies both as a millenial and as a Gen Z, the Gen Z in me appreciates the clearly colour-coded examples. Also, I'm afraid these emoji might not be inclusive for colourblind people. I recommend ✅❌ the next time.

I tried to use those emojis but I couldn't find the red cross in the GitHub emoji dropdown 😂