Fix some notebooks for nbval

Author: takluyver

doc/ipynb/current-driven-domain-wall.ipynb

@@ -320,7 +320,7 @@
     "x = np.arange(len(m0_z))\n",
     "index_max = np.argmax(np.abs(m0_z))\n",
     "\n",
-    "print 'Maximum |m_z| at x =', x[index_max]"
+    "print('Maximum |m_z| at x = %s' % x[index_max])"
    ]
   },
   {

doc/ipynb/isolated_skyrmion.ipynb

@@ -1257,6 +1257,7 @@
     }
    ],
    "source": [
+    "# PYTEST_VALIDATE_IGNORE_OUTPUT\n",
     "# Relax the system to its equilibrium.\n",
     "sim.relax(dt=1e-13, stopping_dmdt=0.01, max_steps=5000, save_m_steps=None, save_vtk_steps=None)"
    ]

doc/ipynb/standard_problem_4.ipynb

@@ -154,7 +154,7 @@
     "sim.add(UniformExchange(A=A))\n",
     "sim.add(Demag())\n",
     "\n",
-    "H0 = [Ms/sqrt(3) for _ in xrange(3)]\n",
+    "H0 = [Ms/sqrt(3) for _ in range(3)]\n",
     "Ht = lambda t: 1 - t / 0.5e-9 if t < 0.5e-9 else 0\n",
     "sim.add(TimeZeeman(H0, Ht))  # saturating field which is reduced over 0.5 nanoseconds"
    ]
@@ -909,7 +909,7 @@
     }
    ],
    "source": [
-    "%%time\n",
+    "# PYTEST_VALIDATE_IGNORE_OUTPUT\n",
     "sim.set_m((1.0, 0.25, 0.1))\n",
     "sim.set_tols(rtol=1e-10, atol=1e-10)\n",
     "sim.relax(dt=1e-13, stopping_dmdt=0.01, max_steps=5000, save_m_steps=None, save_vtk_steps=None);\n",

doc/ipynb/tutorial-basics.ipynb

@@ -1330,6 +1330,7 @@
     }
    ],
    "source": [
+    "# PYTEST_VALIDATE_IGNORE_OUTPUT\n",
     "sim.relax(dt=1e-11, stopping_dmdt=0.01, max_steps=1000, save_m_steps=10, save_vtk_steps=100)"
    ]
   },
@@ -1456,6 +1457,7 @@
     }
    ],
    "source": [
+    "# PYTEST_VALIDATE_IGNORE_OUTPUT\n",
     "ls"
    ]
   },