Avoid panic caused by arithmetic underflow when mouse-dragging #1010
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…nt outside the intellij idea terminal.
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I changed the underflowing
- 1to a saturating_sub. Meaning that when the left hand side is 0, the result is now 0 and not a panic.I also added a test case that was triggering the panic for me when I was dragging my mouse to select some text.
Should resolve #835