vim ~/diary/2021-09 next month : vim ~/diary/2021-10 dunno why its in months. years ago I noticed a colleague doing this, thought it was a good idea and pretty

vim ~/diary/2021-09 next month : vim ~/diary/2021-10 dunno why its in months. years ago I noticed a colleague doing this, thought it was a good idea and pretty much copied him. (he used emacs though ;) )