examples: minor tidy up in examples scripts

examples/infrasound/2d_infrasound_example.py

@@ -11,9 +11,7 @@
 
 
 src_coords = np.array([4800., 2250.])[np.newaxis, :]
-# rec_coords = np.array([[2000., 4400.], [7505., 3025.],
-#                        [7200., 1275.], [2150., 3300.],
-#                        [3000., 1000.], [6505, 4500.]])
+
 rec_coords = np.array([[3000., 2250.], [2000., 1800.],
                        [1000., 1600.], [6500., 2300.],
                        [7500., 1800.], [8500, 1500.],

examples/vti/2D_vti_fletcher_plessix.py

@@ -1,13 +1,14 @@
 """
-Simple example implementing a free-surface with Fletcher et al's VTI
-formulation. This code will save four snapshots at intervals of 0.2*tn,
-where tn is the end time (zero timestep will not be outputted). This
-code will use real-world topography taken from a Digital Elevation Map
-(DEM) of Mt St Helens, USA. The constant material properties ensure all
-reflections are products of the immersed boundary treatment, rather then
-resulting from any discontinuity in impedence. Alternatively, the
-formulation of Plessix and Cao 2011 can be used (assuming locally-constant)
-parameters.
+Simple example implementing a free-surface with ether Duveneck/Plessix VTI
+or Fletcher et al's VTI formulation. This code will save four snapshots at
+intervals of 0.2*tn, where tn is the end time (zero timestep will not be
+outputted). This code will use real-world topography taken from a Digital
+Elevation Map (DEM) of Mt St Helens, USA. The constant material properties
+ensure all reflections are products of the immersed boundary treatment,
+rather than resulting from any discontinuity in impedence. Alternatively,
+the formulation of Plessix and Cao 2011 can be used (assuming
+locally-constant) parameters. This is equivelant to the formulation of
+Duveneck et al 2008.
 """
 
 import matplotlib.pyplot as plt