Update docs/examples/droplet_fusion/droplet_fusion.rst

Co-authored-by: Joep Vanlier <JoepVanlier@users.noreply.github.com>

docs/examples/droplet_fusion/droplet_fusion.rst

@@ -51,6 +51,7 @@ The jump in the signal after 5 seconds shows the typical exponential relaxation
 
 Select data for fit
 ^^^^^^^^^^^^^^^^^^^
+
 Below we are selecting the force and trap data at the fusion event. When fitting the fusion relaxation time, 
 it is important that the traps holding the droplets are either both static, or one of the traps is moving at a constant speed. 
 We plot the trap position over time to check which of these conditions is met::