cleaning: minor rewording, mention "clean.requireForce" config var

Signed-off-by: Robert P. J. Day <[email protected]>

Author: robertpjday

book/07-git-tools/sections/stashing-cleaning.asc

@@ -225,20 +225,19 @@ This is a nice shortcut to recover stashed work easily and work on it in a new b
 [[_git_clean]]
 ==== Cleaning your Working Directory
 
-Finally, you may not want to stash some work or files in your working directory, but simply get rid of them.
-The `git clean` command will do this for you.
+Finally, you may not want to stash some work or files in your working directory, but simply get rid of them; that's what the `git clean` command is for.
 
-Some common reasons for this might be to remove cruft that has been generated by merges or external tools or to remove build artifacts in order to run a clean build.
+Some common reasons for cleaning your working directory might be to remove cruft that has been generated by merges or external tools or to remove build artifacts in order to run a clean build.
 
 You'll want to be pretty careful with this command, since it's designed to remove files from your working directory that are not tracked.
 If you change your mind, there is often no retrieving the content of those files.
 A safer option is to run `git stash --all` to remove everything but save it in a stash.
 
 Assuming you do want to remove cruft files or clean your working directory, you can do so with `git clean`.
 To remove all the untracked files in your working directory, you can run `git clean -f -d`, which removes any files and also any subdirectories that become empty as a result.
-The `-f` means 'force' or "really do this".
+The `-f` means 'force' or ``really do this,'' and is required if the Git configuration variable `clean.requireForce` is not explicitly set to false.
 
-If you ever want to see what it would do, you can run the command with the `-n` option, which means ``do a dry run and tell me what you _would_ have removed''.
+If you ever want to see what it would do, you can run the command with the `--dry-run` (or `-n`) option, which means ``do a dry run and tell me what you _would_ have removed''.
 
 [source,console]
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