Adjust header levels

Handling-Of-Unplayable-Files.md

@@ -1,4 +1,4 @@
-# Dictionary
+## Dictionary
 
 **valid song** - a song is valid if it exists and is playable
 
@@ -6,7 +6,7 @@
 
 **playable song** - a media file or stream with a format that your GStreamer's installation understands and can play
 
-# General rule
+## General rule
 
 A general rule is to grey out a song in the playlist if it's not valid.
 Also, if a song was once invalid and at some point it becomes valid again, we want it to be repainted black.
@@ -14,9 +14,9 @@ Also, if a song was once invalid and at some point it becomes valid again, we wa
 
 Be aware that we are NOT monitoring your playlist items in the background hence you won't see any unexpected "flickering" of colors in your playlists. All the factors that might trigger a change of colors are described below.
 
-# Built-in features
+## Built-in features
 
-## Playing a once valid song
+### Playing a once valid song
 
 Whenever you try to play a song that was once valid, Clementine will check if the file or stream is still valid. 
 
@@ -24,7 +24,7 @@ If that's not the case, the item will be greyed out in the playlist view and Cle
 
 All this applies to both manual and automatic playback requests. 
 
-## Playing a once broken song
+### Playing a once broken song
 
 Whenever you try to play a song which was once broken and is hence greyed out, Clementine will recheck it's validity. 
 
@@ -32,7 +32,7 @@ If the song is now valid again, it's metadata will be reloaded and the song will
 
 All this applies to both manual and automatic playback requests. 
 
-## Startup of the player
+### Startup of the player
 
 If you have the "Grey out non existent songs in my playlists" setting on (check out the "Behavior" section of Clementine's settings), a scan of all your playlist items will be ran each time the player is started.