extended documentation of LightConeDefinitionFile parameter

documentation/05_parameterfile.md

@@ -1091,6 +1091,7 @@ geometry.
 An example for a lightcone definition file could look like this:
 
 0 0   0.5    1.0
+
 1 0   0.4    1.0    0
 
 This would define a full-sky light cone from z=1 to z=0, and an octant