Change in number of digits of largest relative line number in file makes display jump left to right

[saulrh]

The width of the relative line number column is dependent on the largest relative line number in the file: if the maximum relative line number is 95, then the column will be three-ish characters wide; if the maximum relative line number is 105, then the column will be four-ish characters wide. If the user scrolls so that the maximum relative line number crosses a power of ten, the maximum relative line number gains or loses a digit, the column changes width, and the entire source file jumps to the side by one character. This is rather disturbing visually.

[saulrh]

According to his commit messages, ivarboms has fixed this in his fork. Can we get that pulled in?