slide for reverting a commit

2019/2019-09-24_advancedGitTraining/slides/revert.md

-# Theory: Git Revert
+# Reverting a commit
 
-* Enables the deletion of committed commits
+* Enables the deletion of committed commits by reverting the changes.
+* A trace is kept in history of the original commit and the reverted one.
 
 
 
-# Practical: Git Revert
+# Example:
 
 * On your branch, create and commit a file:
 ```bash
-$ echo "# This commits contains errors" > revert.txt
-$ git add revert.txt
-$ git commit -m "Error"
+$ cd attendees
+$ echo "# Grades for Firstname Lastname" > grades.md
+$ git add grades.md
+$ git commit -m "File with grades for Firstname Lastname"
 ```
-* check the commit log and copy the `Error` commit ID:
+
+* check the commit log and copy the SHA1:
 ```bash
 $ git log
 ```
-* Use the 'git revert' command to undo this selected commit:
+* Use the `git revert` command to undo this selected commit:
 ```bash
 $ git revert <sha1>
 ```