Add Fix Whitespace Errors Throughout Branch Commits as a Git TIL

README.md

@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
 
-_1536 TILs and counting..._
+_1537 TILs and counting..._
 
 ---
 
@@ -311,6 +311,7 @@ _1536 TILs and counting..._
 - [Find And Remove Files That Match A Name](git/find-and-remove-files-that-match-a-name.md)
 - [Find The Date That A File Was Added To The Repo](git/find-the-date-that-a-file-was-added-to-the-repo.md)
 - [Find The Initial Commit](git/find-the-initial-commit.md)
+- [Fix Whitespace Errors Throughout Branch Commits](git/fix-whitespace-errors-throughout-branch-commits.md)
 - [Get Latest Commit Timestamp For A File](git/get-latest-commit-timestamp-for-a-file.md)
 - [Get The Name Of The Current Branch](git/get-the-name-of-the-current-branch.md)
 - [Get The Short Version Of The Latest Commit](git/get-the-short-version-of-the-latest-commit.md)

git/fix-whitespace-errors-throughout-branch-commits.md

@@ -0,0 +1,39 @@
+# Fix Whitespace Errors Throughout Branch Commits
+
+Let's say we've been working on some changes to our repository on a branch.
+We've made several commits. We are close to putting up a PR, but we want to
+make sure everything is tidied up.
+
+We run a check and see that there are some whitespace errors that should be
+fixed.
+
+```bash
+$ git diff main --check
+README.md:1: trailing whitespace.
++# git-playground
+script.sh:9: trailing whitespace.
++
+```
+
+This post isn't able to show the highlighted whitespace errors, but we can see
+the warnings above.
+
+Rather than cluttering things with an additional commit that fixes these errors
+or manually cleaning up each commit, we can ask `git` to fix it for us.
+
+```bash
+$ git rebase --whitespace=fix main
+```
+
+That will do a manual rebase of each commit addressing the whitespace errors.
+
+We can run the error check again and see no output, which means we are good to
+go.
+
+```bash
+$ git diff main --check
+```
+
+See the section on `--whitespace` in `man git-apply` for more details.
+
+[source](https://git-scm.com/book/en/v2/Customizing-Git-Git-Configuration)