Update chapter3-tests-classes.ipynb

Author: TomasBeuzen

chapters/chapter3-tests-classes.ipynb

@@ -210,7 +210,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Somewhat related to testing and function design are the philosophies EAFP and LBYL. EAFP = \"Easier to ask for fogiveness than permission\". In coding lingo: try doing something, and if it doesn't work, catch the error. LBYL = \"Look before you leep\". In coding lingo: check that you can do something before trying to do it. These two acronyms refer to coding philosophies about how to write your code. Let's see an example:"
+    "Somewhat related to testing and function design are the philosophies EAFP and LBYL. EAFP = \"Easier to ask for fogiveness than permission\". In coding lingo: try doing something, and if it doesn't work, catch the error. LBYL = \"Look before you leap\". In coding lingo: check that you can do something before trying to do it. These two acronyms refer to coding philosophies about how to write your code. Let's see an example:"
    ]
   },
   {