Magit allows selective staging/unstaging, either of hunks, or by selecting lines (AKA Emacs's "region"). I avoid staging from the git commandline, unless I'm just doing whole files.
PS: Majutsu provides this too (a magit-like tool for jj)
PS: Majutsu provides this too (a magit-like tool for jj)
It releases me from having to have the "discipline" to stay 100% focused on the broader task at hand and say "hmm, I should fix that while I'm here", without co-mingling purposefully different commits.
Truly fantastic. Absurdly, I have no idea how to do this on the command line, though presumably it is possible from there too (just a lot, lot less convenient).