Merge pull request #162 from agsdot/patch-1

Fix typo

README.md

@@ -22,7 +22,7 @@ Usage: $0 [-adhrspvzZ] imagefile.img [newimagefile.img]
 
 If you specify the `newimagefile.img` parameter, the script will make a copy of `imagefile.img` and work off that. You will need enough space to make a full copy of the image to use that option.
 
-* `-s` prevents automatic filesystem expantion on the images next boot
+* `-s` prevents automatic filesystem expansion on the images next boot
 * `-v` enables more verbose output
 * `-r` will attempt to repair the filesystem using aditional options if the normal repair fails
 * `-z` will compress the image after shrinking using gzip. `.gz` extension will be added to the filename.