Pick Specific Changes To Stash
If you run git stash, all of the changes to tracked files on the working tree will be put into a commit-like entity in the stash list.
If you want to be a bit choosier about what gets saved during a stash, you can include the --patch flag.
With --patch, you can interactively select hunks from the diff between HEAD and the working tree to be stashed.
Once in the interactive mode initiated by --patch, you'll be presented with a change of changes and some options. You hit y for "yes, include this" and n for "no, don't include that". And then there are some more advanced options which you can read about in the Interactive Mode section of git-add's man page.
See man git-stash for more details.
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