Improve readability of the sleep script a bit

Signed-off-by: Dorian Stoll <dorian.stoll@tmsp.io>

root/lib/systemd/system-sleep/sleep

@@ -1,4 +1,5 @@
-#!/bin/bash
+#!/bin/sh
+
 case $1 in
   pre)    # unload the modules before going to sleep
 
@@ -25,12 +26,16 @@ case $1 in
     # modprobe -r mei_me
     # modprobe -r mei
     ## > Remove IPTS from i915 side
-    #for i in $(find /sys/kernel/debug/dri -name i915_intel_ipts_cleanup); do echo 1 > $i; done
+    # for i in $(find /sys/kernel/debug/dri -name i915_intel_ipts_cleanup); do
+    #   echo 1 > $i
+    # done
     ;;
   post)   # re-load modules after resume
     ## IPTS: see notes below
     ## > Load IPTS from i915 side
-    #for i in $(find /sys/kernel/debug/dri -name i915_intel_ipts_init); do echo 1 > $i; done
+    # for i in $(find /sys/kernel/debug/dri -name i915_intel_ipts_init); do
+    #   echo 1 > $i
+    # done
     ## > Load IPTS from ME side
     # modprobe mei
     # modprobe mei_me
@@ -57,6 +62,7 @@ case $1 in
 esac
 
 # Notes:
+#
 # - For IPTS, see
 #   >  https://github.com/jakeday/linux-surface/issues/544#issuecomment-519126757
 #   for an explanation/discussion. We do not unload/reload modules for now as
@@ -64,6 +70,7 @@ esac
 #   experience any issues on suspend/resume, please file an appropriate issue or
 #   join the discussion linked above so that we can fix it. As a temporary
 #   workaround, you may want to uncomment the IPTS-related lines above.
+#
 # - For bluetooth: If you have spontaneous wakeups, you may want to disable
 #   bluetooth completely, regardless if any devices are connected or not, by
 #   removing the `! bluetoothctl info;` part as indicated in the comment (e.g.