Fixed typo

Author: seanlaw

docs/Tutorial_Pattern_Searching.ipynb

@@ -198,7 +198,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "In the plot above, the periods of time when the robot dog was walking on cement is displayed with a white background while the times when the robot dog was walking on carpet is highlighted with a grey background. Do you notice any apppreciable difference(s) between walking on the different surfaces? Are there any interesting insights that you can observe with the human eye? Do any conserved patterns exist within this time series and, if so, where are they?"
+    "In the plot above, the periods of time when the robot dog was walking on cement is displayed with a white background while the times when the robot dog was walking on carpet is highlighted with a grey background. Do you notice any appreciable difference(s) between walking on the different surfaces? Are there any interesting insights that you can observe with the human eye? Do any conserved patterns exist within this time series and, if so, where are they?"
    ]
   },
   {