Indent the toml config for readability

plugins/mysql/mysql.go

@@ -14,14 +14,15 @@ type Mysql struct {
 }
 
 var sampleConfig = `
-# specify servers via a url matching:
-#  [username[:password]@][protocol[(address)]]/[?tls=[true|false|skip-verify]]
-#  e.g.
-#    root:root@http://10.0.0.18/?tls=false
-#    root:passwd@tcp(127.0.0.1:3036)/
-#
-# If no servers are specified, then localhost is used as the host.
-servers = ["localhost"]`
+	# specify servers via a url matching:
+	#  [username[:password]@][protocol[(address)]]/[?tls=[true|false|skip-verify]]
+	#  e.g.
+	#    root:root@http://10.0.0.18/?tls=false
+	#    root:passwd@tcp(127.0.0.1:3036)/
+	#
+	# If no servers are specified, then localhost is used as the host.
+	servers = ["localhost"]
+`
 
 func (m *Mysql) SampleConfig() string {
 	return sampleConfig