assert_equals(Text node "Two", Text node "Two")
    at Test.<anonymous> ( /selection/modify-line-flex-column.tentative.html:21:3)

assert_equals(2, 2)
    at Test.<anonymous> ( /selection/modify-line-flex-column.tentative.html:22:3)

assert_equals(Text node "Three", Text node "Three")
    at Test.<anonymous> ( /selection/modify-line-flex-column.tentative.html:26:3)

assert_equals(2, 2)
    at Test.<anonymous> ( /selection/modify-line-flex-column.tentative.html:27:3)

assert_equals("e\n\nTwo\n\nTh", "e\n\nTwo\n\nTh")
    at Test.<anonymous> ( /selection/modify-line-flex-column.tentative.html:29:3)

assert_equals(Text node "Two", Text node "Two")
    at Test.<anonymous> ( /selection/modify-line-flex-column.tentative.html:37:3)

assert_equals(2, 2)
    at Test.<anonymous> ( /selection/modify-line-flex-column.tentative.html:38:3)

assert_equals(Text node "One", Text node "One")
    at Test.<anonymous> ( /selection/modify-line-flex-column.tentative.html:42:3)

assert_equals(2, 2)
    at Test.<anonymous> ( /selection/modify-line-flex-column.tentative.html:43:3)

assert_equals("e\n\nTwo\n\nTh", "e\n\nTwo\n\nTh")
    at Test.<anonymous> ( /selection/modify-line-flex-column.tentative.html:45:3)