diff --git a/bash/mount.sh b/bash/mount.sh
index 9fda047..b9bc609 100644
--- a/bash/mount.sh
+++ b/bash/mount.sh
@@ -1,41 +1,44 @@
 mo() {
-local directory="${1}"
-local file
-if [ "${directory}" ] ; then
-    directory="$(realpath "${directory}")"
-    file="${directory}/filesystem.squashfs"
-    if mkdir "overlay" ; then
-        cd "overlay"
-        mkdir {lower,upper,work,mount}
-        if mount "${file}" "lower" ; then
-            mount -t "overlay" "overlay" "mount" \
--o lowerdir="lower",upperdir="upper",workdir="work"
-        fi
-        cd ..
-    fi
-else
-    echo "KO: directory?"
-fi
+	local directory="${1}"
+	local file
+	if [ "${directory}" ] ; then
+		directory="$(realpath "${directory}")"
+		file="${directory}/filesystem.squashfs"
+		if mkdir "overlay" ; then
+			cd "overlay"
+			mkdir {lower,upper,work,mount}
+			if mount "${file}" "lower" ; then
+				mount \
+					-o lowerdir="lower",upperdir="upper",workdir="work"
+					-t "overlay" \
+					"overlay" "mount"
+			fi
+			cd ..
+		fi
+	else
+		echo "KO: directory?"
+	fi
 }
 
 uo() {
-cd "overlay"
-if umount "mount" ; then
-    rmdir "mount"
-    rm --recursive "upper" "work"
-    if umount "lower" ; then
-        rmdir "lower"
-    fi
-fi
-cd ..
-rmdir "overlay"
+	cd "overlay"
+	if umount "mount" ; then
+		rmdir "mount"
+		rm --recursive "upper" "work"
+		if umount "lower" ; then
+			rmdir "lower"
+		fi
+	fi
+	cd ..
+	rmdir "overlay"
 }
 
 
 mr() {
-for f in "dev" "dev/pts" "proc" "sys" ; do
-    mount --bind "/${f}" "overlay/mount/${f}"
-done
+	local f
+	for f in "dev" "dev/pts" "proc" "sys" ; do
+		mount --bind "/${f}" "overlay/mount/${f}"
+	done
 }
 
 alias cr="\
@@ -50,33 +53,34 @@ chroot \
 "
 
 ur() {
-for f in "sys" "proc" "dev/pts" "dev" ; do
-    umount --lazy "overlay/mount/${f}"
-done
+	local f
+	for f in "sys" "proc" "dev/pts" "dev" ; do
+		umount --lazy "overlay/mount/${f}"
+	done
 }
 
 
 mm() {
-mount --make-rslave --rbind "/deb" "overlay/mount/deb"
+	mount --make-rslave --rbind "/deb" "overlay/mount/deb"
 }
 
 um() {
-umount --recursive "overlay/mount/deb"
+	umount --recursive "overlay/mount/deb"
 }
 
 
 ms() {
-local directory="${1}"
-local level="${2}"
-if [ "${directory}" ] ; then
-    if mkdir "${directory}" ; then
-        [ "${level}" ] || level="18"
-        cp overlay/mount/{vmlinuz,initrd.img} "${directory}"
-        mksquashfs \
-"overlay/mount" "${directory}/filesystem.squashfs" \
--noappend \
--comp "zstd" -Xcompression-level "${level}"
-        chown --recursive 1000:1000 "${directory}"
-    fi
-fi
+	local directory="${1}"
+	local level="${2}"
+	if [ "${directory}" ] ; then
+		if mkdir "${directory}" ; then
+			[ "${level}" ] || level="18"
+			cp overlay/mount/{vmlinuz,initrd.img} "${directory}"
+			mksquashfs \
+				"overlay/mount" "${directory}/filesystem.squashfs" \
+				-noappend \
+				-comp "zstd" -Xcompression-level "${level}"
+			chown --recursive 1000:1000 "${directory}"
+		fi
+	fi
 }