Fix row info when indentation is `FALSE` in `matrix_form` #1001

All 204 tests pass in 1m 33s

1 files ±0 25 suites ±0 1m 33s ⏱️ +3s
204 tests ±0 204 ✅ +4 0 💤 ±0 0 ❌ ±0
1 526 runs - 2 1 526 ✅ +2 0 💤 ±0 0 ❌ ±0

Results for commit 5f9ab52. ± Comparison against earlier commit 36086b8.