Improve table formatting

[jmg-duarte]

When I do show prefix "" the output table comes out deformed.

leveldb» show prefix ""
Key                                                                             | Value
/                                                                       | d
//QmdfTbBqBPQ7VNxZEYEj14VmRuZBkqFbiwReogJgS1zR1n                        | {"v":"1","i":"2024-06-11T14:13:15.721474+01:00","d":[{"u":"a2fb7ea8-e094-42c2-acdf-74c267656638","y":true,"i":10,"m":"f24yeyklfsjvav6onmm4k2lbkfi6chnke5ivt5wbq","s":0,"o":0,"l":0,"c":0,"d":false},{"u":"a2fb7ea8-e094-42c2-acdf-74c267656638","y":true,"i":10,"m":"f24yeyklfsjvav6onmm4k2lbkfi6chnke5ivt5wbq","s":0,"o":0,"l":0,"c":0,"d":true}],"c":0}
/1220e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855   | [{"/":"QmdfTbBqBPQ7VNxZEYEj14VmRuZBkqFbiwReogJgS1zR1n"}]
/0/1220e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855         |