Fix `col_labels` bug for named label attributes #805

All 186 tests pass, 2 skipped in 2s

1 files ±0 14 suites ±0 2s ⏱️ -1s
188 tests ±0 186 ✅ ±0 2 💤 ±0 0 ❌ ±0
259 runs ±0 257 ✅ ±0 2 💤 ±0 0 ❌ ±0

Results for commit a5e31a9. ± Comparison against earlier commit cf38bb8.