Update effectmanager.adoc

Removed unneeded new line breaks.

src/docs/asciidoc/jme3/contributions/tonegodgui/effectmanager.adoc

@@ -10,8 +10,8 @@ ifdef::env-github,env-browser[:outfilesuffix: .adoc]
 
 == EffectManager
 
-The EffectManager can be used to execute Effects, BatchEffects and EffectQueues against a single Element or a group of nested or separate Elements.  Effects include shader-based effects, geometry-based effects and can include an audio event if UIAudio has been enabled.+
-+
+The EffectManager can be used to execute Effects, BatchEffects and EffectQueues against a single Element or a group of nested or separate Elements.  Effects include shader-based effects, geometry-based effects and can include an audio event if UIAudio has been enabled.
+
 The EffectManager is accessed through the Screen class, like so:
 
 [source,java]