When a code differential involves code that's been moved from one place to another, the differential view helpfully shows a marigold vertical bar on the right-hand pane, next to the line numbers, that says "moved from XXX in dir YYY" if you hover over it.

This is a request to add the complementary bar on the left hand side, for code that has moved elsewhere, that says "moved to AAA in dir BBB" if you hover over it.

This would have been useful in a review I just did, where I wanted to verify that all the code that was "deleted" in the review was actually moved somewhere else.