fix: BitView slice filter

[a10y]

I wrote the unit test, it failed, stepped through it in debugger, noticed that span was always zero. We always clear the lowest bit and then check for trailing_ones, so we never copied anything.

Fixes the logic to actually copy runs of values. Test passes now.

[codspeed-hq]

CodSpeed Performance Report

Merging #5381 will not alter performance

_{Comparing aduffy/fix-bitview-filter (6cab3ed) with develop (e269163)}

Summary

✅ 1428 untouched
⏩ 645 skipped¹
🗄️ 28 archived benchmarks run²

Footnotes

1. 645 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

2. 28 benchmarks were run, but are now archived. If they were deleted in another branch, consider rebasing to remove them from the report. Instead if they were added back, click here to restore them. ↩

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.08%. Comparing base (e269163) to head (6cab3ed).
⚠️ Report is 5 commits behind head on develop.

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