Add small corrections to docs

docs/en/modules/am2320.md

@@ -17,7 +17,7 @@ Initializes the module and sets the pin configuration. Returns model, version, s
 - `version`  8 bits version number
 - `serial`  32 bits serial number
 
-   Note: I have only observerd values of 0 for all of these, maybe other sensors return more sensible readings.
+   Note: I have only observed values of 0 for all of these, maybe other sensors return more sensible readings.
 
 ## am2320.read()
 Samples the sensor and returns the relative humidity in % and temperature in celsius, as an integer multiplied with 10.
@@ -35,4 +35,5 @@ am2320.init(1, 2)
 rh, t = am2320.read()
 print(string.format("RH: %s%%", rh / 10))
 print(string.format("Temperature: %s degrees C", t / 10))
+```
 

docs/en/modules/mdns.md

@@ -1,38 +1,39 @@
-# mdns Module
+# mDns Module
 
-Multicast DNS is used as part of Bonjour / Zeroconf. This allows system to identify themselves and the services that they provide on a local area network. Clients are then
-able to discover these systems and connect to them. 
+[Multicast DNS](https://en.wikipedia.org/wiki/Multicast_DNS) is used as part of Bonjour / Zeroconf. This allows system to identify themselves and the services that they provide on a local area network. Clients are then able to discover these systems and connect to them. 
 
 ## mdns.register()
-Register a hostname and start the mDns service. If the service is already running, then it 
-will be restarted with the new parameters.
+Register a hostname and start the mDNS service. If the service is already running, then it will be restarted with the new parameters.
 
 #### Syntax
 `mdns.register(hostname, servicename, port [, attributes])`
 
 #### Parameters
 - `hostname` The hostname for this device. Alphanumeric characters are best.
-- `servicename` The servicename for this device. Alphanumeric characters are best. This will get prefixed with '_' and suffixed with ._tcp
+- `servicename` The service name for this device. Alphanumeric characters are best. This will get prefixed with `_` and suffixed with `._tcp`
 - `port` The port number for the primary service.
 - `attributes` A optional table of up to 10 attributes to be exposed. The keys must all be strings.
 
 #### Returns
-Nothing.
+`nil`
 
 #### Errors
-Various errors can be generated during argument validation. The nodemcu must have an IP address at the time of the call, otherwise an error is thrown.
+Various errors can be generated during argument validation. The NodeMCU must have an IP address at the time of the call, otherwise an error is thrown.
 
 #### Example
 
     mdns.register("fishtank", "http", 80, { hardware='NodeMCU'})
 
-Using dns-sd on OSX, you can see fishtank.local as providing the _http._tcp service. You can also browse directly to fishtank.local. In safari you can get all the mdns web pages as part of your bookmarks menu.
+Using `dns-sd` on OS X, you can see `fishtank.local` as providing the `_http._tcp` service. You can also browse directly to `fishtank.local`. In Safari you can get all the mDNS web pages as part of your bookmarks menu.
 
 ## mdns.close()
-Shut down the mDns service. This is not normally needed.
+Shut down the mDNS service. This is not normally needed.
 
 #### Syntax
 `mdns.close()`
 
+#### Parameters
+none
+
 #### Returns
-Nothing.
+`nil`