fix typos

the GRUB_EFI/10-setup script is slightlt modified version of GRUB_PC/10-setup

examples/simple/scripts/GRUB_EFI/10-setup

@@ -3,8 +3,8 @@
 
 error=0; trap 'error=$(($?>$error?$?:$error))' ERR # save maximum error code
 
-# This script assumes that fthe disk has a GPT partition table and
-# that the extended system partition (ESP) is mounted on /boot/esp.
+# This script assumes that the disk has a GPT partition table and
+# that the extended system partition (ESP) is mounted on /boot/efi.
 # When building a disk image, we don't change the NVRAM to point at
 # the boot image we made available, because the disk image is likely
 # not installed on the current system.  As a result, we force