I sometimes need to insert auto_incremented, numbered columns on other people's machines so I'm looking for a good way to do so without relying on any custom plugins, macros, or scripts; standard Vim commands only.
Example going from :
line a line b line c ... line x line y line z
becoming then :
line a line b line 3 c ... line 24 x line 25 y line z
doing something like
If older versions of vim or vi have different ways of doing it I'd appreciate hearing about those solutions, too .