Fixing typos with showedits argument

README.md

@@ -83,10 +83,10 @@ ### Running the script via SSH
 
 <p align="leftr"><img src="images/syno_hdd_db1.png"></p>
 
-If you run the script with the -showedits flag it will show you the changes it made to the Synology's compatible-drive database. Obviously this is only useful if you run the script in a shell.
+If you run the script with the --showedits flag it will show you the changes it made to the Synology's compatible-drive database. Obviously this is only useful if you run the script in a shell.
 
 ```YAML
-sudo -i /path-to-script/syno_hdd_db.sh -nr -showedits
+sudo -i /path-to-script/syno_hdd_db.sh -nr --showedits
 ```
 
 **Note:** Replace /path-to-script/ with the actual path to the script on your Synology.