$ cat file1
Brian Jones - The Rolling Stones
George Harrison - The Beatles
John Lennon - The Beatles
Keith Richards - The Rolling Stones
Mick Jagger - The Rolling Stones
Paul McCartney - The Beatles
Ringo Starr - The Beatles
Ron Wood - The Rolling Stones
$ cat file2
Brian Jones - The Rolling Stones
George Harison - The Beatles
John Lennon - The Beatles
Keith Richards - The Rolling Stones
Mick Jagger - The Rolling Stones
Paul McCartney - The Beatles
Ringo Starr - The Baatles
Ron Wood - The Rolling Stones
$ diff file1 file2
2c2
< George Harrison - The Beatles
---
> George Harison - The Beatles
7c7
< Ringo Starr - The Beatles
---
> Ringo Starr - The Baatles
$ diff -y file1 file2 --w=75
Brian Jones - The Rolling Stones Brian Jones - The Rolling Stones
George Harrison - The Beatles | George Harison - The Beatles
John Lennon - The Beatles John Lennon - The Beatles
Keith Richards - The Rolling Stones Keith Richards - The Rolling Stones
Mick Jagger - The Rolling Stones Mick Jagger - The Rolling Stones
Paul McCartney - The Beatles Paul McCartney - The Beatles
Ringo Starr - The Beatles | Ringo Starr - The Baatles
Ron Wood - The Rolling Stones Ron Wood - The Rolling Stones