Whitespace cleanup

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

plugins/network/shorewall_

@@ -1,11 +1,11 @@
 #!/usr/bin/python
 # shorewall_ v2.0 - 30 Aug 2008 - Tanguy Pruvot <tanguy.pruvot@gmail.com>
-# 
+#
 # A munin plugin for tracking traffic as recorded by shorewall accounting rules
-# 
+#
 # ex: ln -s /usr/share/munin/plugins/shorewall_ /etc/munin/plugins/shorewall_ftp
 # will log ftp* rules like ftp, ftp_input, ftp_output etc...
-# 
+#
 # Basic Concept by Chris AtLee <chris@atlee.ca> Released under the GPL v2
 
 import sys, commands, re
@@ -61,7 +61,7 @@ def getBytesByChain():
     for name in chainNames:
         retval.append((name, chains[name]))
     return retval
- 
+
 if len(sys.argv) > 1:
     if sys.argv[1] == "autoconf":
         print "yes"
@@ -76,6 +76,6 @@ if len(sys.argv) > 1:
             print "%s.label %s" % (chain, chain)
             print "%s.cdef %s,8,*" % (chain, chain)
         sys.exit(0)
- 
+
 for chain, bytes in getBytesByChain():
     print "%s.value %i" % (chain, bytes)