Fix small typo - thanks to J. Grout for the notice

docs/examples/notebooks/trapezoid_rule.ipynb

@@ -53,12 +53,12 b''
                     "outputs": [
                         {
                             "output_type": "stream", 
-                            "text": "The ingtegral is: 680.0 +/- 7.54951656745e-12\nThe trapezoid approximation with 6 points is: 621.286411141"
+                            "text": "The integral is: 680.0 +/- 7.54951656745e-12\nThe trapezoid approximation with 6 points is: 621.286411141"
                         }
                     ], 
                     "collapsed": false, 
                     "prompt_number": 4, 
-                    "input": "from scipy.integrate import quad, trapz\nintegral, error = quad(f, 1, 9)\nprint \"The ingtegral is:\", integral, \"+/-\", error\nprint \"The trapezoid approximation with\", len(xint), \"points is:\", trapz(yint, xint)"
+                    "input": "from scipy.integrate import quad, trapz\nintegral, error = quad(f, 1, 9)\nprint \"The integral is:\", integral, \"+/-\", error\nprint \"The trapezoid approximation with\", len(xint), \"points is:\", trapz(yint, xint)"
                 }, 
                 {
                     "input": "", 
@@ -71,7 +71,7 b''
         }
     ], 
     "metadata": {
-        "name": "trapezoid rule integration"
+        "name": "trapezoid_rule"
     }, 
     "nbformat": 2
-}
  No newline at end of file
+}