Use more reasonable values for the parameter file

examples/IsolatedGalaxy_starformation_25p/isolated_galaxy.yml

@@ -11,8 +11,8 @@ Gravity:
   mesh_side_length:       32        # Number of cells along each axis for the periodic gravity mesh.
   eta:          0.025               # Constant dimensionless multiplier for time integration.
   theta:        0.7                 # Opening angle (Multipole acceptance criterion).
-  comoving_softening:     0.0026994 # Comoving softening length (in internal units).
-  max_physical_softening: 0.0007    # Physical softening length (in internal units).
+  comoving_softening:     0.01 # Comoving softening length (in internal units).
+  max_physical_softening: 0.01    # Physical softening length (in internal units).
 
 # Parameters governing the time integration (Set dt_min and dt_max to the same value for a fixed time-step run.)
 TimeIntegration: