┃ 1┃line 1
tests/tmp/expand_1.txt ┃ 2┃line 2
                       ┃ 3┃line 3
                       ┃ 4┃line 4
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╂╌╌╂╌╌╌╌╌╌╌╌
                       ┃ 6┃line 6
                       ┃ 7┃line 7
tests/tmp/expand_1.txt ┃ 8┃line 8
                       ┃ 9┃line 9
                       ┃10┃line 10
━━━━━━━━━━━━━━━━━━━━━━━╋━━╋━━━━━━━━
                       ┃ 2┃line 2
                       ┃ 3┃line 3
tests/tmp/expand_2.txt ┃ 4┃line 4
                       ┃ 5┃line 5
                       ┃ 6┃line 6