add some blank lines

conf/config.toml

@@ -1,12 +1,16 @@
 [global]
 # whether print configs
 print_configs = false
+
 # add label(agent_hostname) to series
 hostname = ""
+
 # will not add label(agent_hostname) if true
 omit_hostname = false
+
 # s | ms
 precision = "ms"
+
 # global collect interval
 interval_seconds = 15
 
@@ -20,16 +24,20 @@ batch = 2000
 
 [[writers]]
 url = "http://127.0.0.1:19000/prometheus/v1/write"
+
 # Basic auth username
 basic_auth_user = ""
+
 # Basic auth password
 basic_auth_pass = ""
+
 # timeout settings, unit: ms
 timeout = 3000
 dial_timeout = 3000
 tls_handshake_timeout = 3000
 expect_continue_timeout = 1000
 idle_conn_timeout = 90000
+
 # time duration, unit: ms
 keep_alive = 30000
 max_conns_per_host = 0