Add Stash A Single Untracked File as a git til

Author: jbranchaud

README.md

@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://tinyletter.com/jbranchaud).
 
-_1097 TILs and counting..._
+_1098 TILs and counting..._
 
 ---
 
@@ -290,6 +290,7 @@ _1097 TILs and counting..._
 - [Skip Pre-Commit Hooks](git/skip-pre-commit-hooks.md)
 - [Staging Changes Within Vim](git/staging-changes-within-vim.md) 
 - [Staging Stashes Interactively](git/staging-stashes-interactively.md)
+- [Stash A Single Untracked File](git/stash-a-single-untracked-file.md)
 - [Stash Everything](git/stash-everything.md)
 - [Stashing Only Unstaged Changes](git/stashing-only-unstaged-changes.md)
 - [Stashing Untracked Files](git/stashing-untracked-files.md)

git/stash-a-single-untracked-file.md

@@ -0,0 +1,36 @@
+# Stash A Single Untracked File
+
+If you want to stash everything in your work tree and untracked files, you can
+run:
+
+```bash
+$ git stash -u
+```
+
+If you want a bit more control over what gets stashed from the work tree, you
+can interactively stash with `--patch` (or `-p`):
+
+```bash
+$ git stash -p
+```
+
+Unfortunately, the two don't work together.
+
+```bash
+$ git stash -u -p
+Can't use --patch and --include-untracked or --all at the same time
+```
+
+So, if you'd like to stash a specific untracked file, you can instead formulate
+a command like the following:
+
+```bash
+$ git stash -u -- <name-of-untracked-file>
+```
+
+This will stash just the specified untracked file and leave the rest of them as
+they are.
+
+I found this useful when trying to test the setup of a new library. There was
+an extra new file that I didn't think I needed. Stashing it temporarily gets it
+out of the way without losing it.