Update git reset --hard note as per ben's suggestion

Author: Kausar Mehmood

book/02-git-basics/sections/undoing.asc

@@ -79,8 +79,8 @@ The `CONTRIBUTING.md` file is modified but once again unstaged.
 
 [NOTE]
 =====
-While `git reset` _can_ be a dangerous command if you call it with `--hard` as it changes files in your working directory, however in the above example the file in your working directory is not touched.
-Calling `git reset` without an option is not dangerous - it only touches your staging area.
+It's true that `git reset` can be a dangerous command, especially if you provide the `--hard` flag.
+However, in the scenario described above, the file in your working directory is not touched, so it's relatively safe.
 =====
 
 For now this magic invocation is all you need to know about the `git reset` command.