Added period.

src/docs/asciidoc/jme3/advanced/physics.adoc

@@ -366,7 +366,7 @@ gameLevel.addControl(new RigidBodyControl(0.0f)); // explicit zero mass, implici
 
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-Spheres and Boxes automatically fall back on the correct default CollisionShape if you do not specify a CollisionShape in the RigidBodyControl constructor. Complex static objects can fall back on MeshCollisionShapes, unless it is a Node, in which case it will become a CompoundCollisionShape containing a MeshCollisionShape
+Spheres and Boxes automatically fall back on the correct default CollisionShape if you do not specify a CollisionShape in the RigidBodyControl constructor. Complex static objects can fall back on MeshCollisionShapes, unless it is a Node, in which case it will become a CompoundCollisionShape containing a MeshCollisionShape.
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