Whitespace cleanup

* remove trailing whitespace
* remove empty lines at the end of files

plugins/disk/lvm_snap_used

@@ -3,7 +3,7 @@
 # Plugin to monitor the % of allocated area of a LVM snapshot
 #
 # Parameters:
-# 	
+#
 # 	config
 # 	autoconf
 #
@@ -12,7 +12,7 @@
 #
 #%# family=auto
 #%# capabilities=autoconf
-# 
+#
 # 2011/05/20 - pmoranga - initial version
 #
 # 2012/01/27 - Sébastien Gross
@@ -35,7 +35,7 @@ fi
 
 
 if [ "$1" = "config" ]; then
-	echo 'graph_title Allocated space for snapshot' 
+	echo 'graph_title Allocated space for snapshot'
 	echo 'graph_vlabel %'
 	echo 'graph_category disk'
 	echo 'graph_args -l 0 -u 100 -r'
@@ -48,7 +48,7 @@ ${lvdisplay} -C | awk '$3 ~ /^s/{print}' | while read line; do
     origin="$(echo $line | awk '{print $5}')"
     origin="$(clean_fieldname "$origin")"
     percent="$(echo $line | awk '{print $6}')"
-    
+
     if [ "$1" = "config" ]; then
         echo "$id.label $name snapshot of $origin"
     else