Updated MQTT Features (markdown)

MQTT-Features.md

@@ -6,7 +6,7 @@ Sonoff responds to the following MQTT commands using MQTT Topic for ```cmnd/sono
 
 - The telemetry messages can also be sent with the retain flag, but this is a compile time option. See [#1071](https://github.com/arendst/Sonoff-Tasmota/issues/1071).
 
-- For sonoff dual or 4CH the relays need to be addressed with ```cmnd/sonoff/power{n}```, where {n} is the relay number from 1 to 2(dual) or from 1 to 4(4CH).
+- For Sonoff Dual or 4CH the relays need to be addressed with `cmnd/sonoff/power<x>`, where `<x>` is the relay number from 1 to 2 (Dual) or from 1 to 4 (4CH).
 
 - The MQTT topic can be changed with ```cmnd/sonoff/topic sonoff1``` which reboots sonoff and makes it available for MQTT commands like ```cmnd/sonoff1/power on```.
 
@@ -18,7 +18,7 @@ Sonoff responds to the following MQTT commands using MQTT Topic for ```cmnd/sono
 
 - The button can send a MQTT message to the broker that in turn will switch the relay. To configure this you need to perform ```cmnd/sonoff/ButtonTopic sonoff``` where sonoff equals to Topic. The message can also be provided with the retain flag by ```cmnd/sonoff/ButtonRetain on```.
 
-- Sonoff Pow status can be retreived with ```cmnd/sonoff/status 8``` or periodically every 5 minutes using ```cmnd/sonoff/TelePeriod 300```.
+- Sonoff Pow status can be retrieved with ```cmnd/sonoff/status 8``` or periodically every 5 minutes using ```cmnd/sonoff/TelePeriod 300```.
 
 - When a Sonoff Pow threshold like PowerLow has been met a message ```tele/sonoff/POWER_LOW ON``` will be sent. When the error is corrected a message ```tele/sonoff/POWER_LOW OFF``` will be sent.