[Documentation] Markdown improvements f to m (#13866)

Signed-off-by: Jerome Luckenbach <github@luckenba.ch>

bundles/org.openhab.binding.mpd/README.md

@@ -4,7 +4,6 @@
 
 With the openHAB MPD binding you can control Music Player Daemons.
 
-
 ## Supported Things
 
 This binding supports one ThingType: mpd
@@ -13,7 +12,6 @@ This binding supports one ThingType: mpd
 
 If zeroconf is enabled in the Music Player Daemon, it is discovered. Each Music Player daemon requires a unique zeroconf_name for correct discovery.
 
-
 ## Thing Configuration
 
 The ThingType mpd requires the following configuration parameters:
@@ -24,7 +22,6 @@ The ThingType mpd requires the following configuration parameters:
 | Port            | port         | Port number on which the Music Player Daemon is listening. Default: 6600 | yes      |
 | Password        | password     | Password to access the Music Player Daemon                               | no       |
 
-
 ## Channels
 
 The following channels are currently available:
@@ -42,18 +39,17 @@ The following channels are currently available:
 | currenttitle    | String    | Current title             |
 | currenttrack    | Number    | Current track             |
 
-
 ## Full Example
 
-#### Thing
+### Thing
 
-```
+```java
 mpd:mpd:music  [ ipAddress="192.168.1.2", port=6600 ]
 ```
 
-#### Items
+### Items
 
-```
+```java
 Switch morning_music "Morning music"
 
 Player mpd_music_player "Player" { channel = "mpd:mpd:music:control" }
@@ -68,9 +64,9 @@ String mpd_music_title "Title [%s]" { channel = "mpd:mpd:music:currenttitle" }
 Number mpd_music_track "Track [%d]" { channel = "mpd:mpd:music:currenttrack" }
 ```
 
-#### Sitemap
+### Sitemap
 
-```
+```perl
 Frame label="Music" {
     Default item=mpd_music_player
     Slider item=mpd_music_volume
@@ -85,9 +81,9 @@ Frame label="Music" {
 }
 ```
 
-#### Rule
+### Rule
 
-```
+```java
 rule "turn on morning music"
 when
         Item morning_music changed to ON