Change config file indentation to 2 spaces

plugins/memcached/memcached.go

@@ -17,11 +17,11 @@ type Memcached struct {
 }
 
 var sampleConfig = `
-	# An array of address to gather stats about. Specify an ip on hostname
-	# with optional port. ie localhost, 10.0.0.1:11211, etc.
-	#
-	# If no servers are specified, then localhost is used as the host.
-	servers = ["localhost"]
+  # An array of address to gather stats about. Specify an ip on hostname
+  # with optional port. ie localhost, 10.0.0.1:11211, etc.
+  #
+  # If no servers are specified, then localhost is used as the host.
+  servers = ["localhost"]
 `
 
 var defaultTimeout = 5 * time.Second