Whitespace cleanup

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

plugins/network/if_uptime

@@ -19,7 +19,7 @@
 #
 # Plugin                     | Used | Suggestions
 # ------                     | ---- | -----------
-# if_uptime                  | yes  | 
+# if_uptime                  | yes  |
 #
 # 7. Restart munin: "/etc/init.d/munin-node restart"
 # 8. Hold on for 5 minutes at most and watch the graph appear.
@@ -117,7 +117,7 @@ $current_uptime
 EOF
 
 }
-# Munin routines 
+# Munin routines
 	case "$1" in
 		autoconf)
 			if [[ $(ifconfig &> /dev/null; echo "$?") == 0 ]]; then
@@ -146,7 +146,7 @@ EOM
 				done
 			exit 0
 		;;
-			*)	
+			*)
 # Print data for Munin
 			for (( i=0; i<"${#INTERFACES[*]}"; i++ ))
 				do