typos

Author: Tom-van-Woudenberg

book/08/asserts.ipynb

@@ -149,7 +149,7 @@
     "\n",
     "You are given the method `calculate_area` again to calculate the *shuttering area* of a concrete rectangular column. The shuttering is a temporary arrangement done for vertical surfaces to support the wet concrete till it attains the desired strength (source: [Civilread.com](https://civilread.com/how-to-calculate-shuttering-area/)).\n",
     "\n",
-    "Write assertions in `test_calculate_area` that can verify that method `calculate_area` is free of bugs. Make sure you include meaningful messages in case a test fails. Consult section [Assertions](./assertions.ipynb) again and try to write tests that test the boundary values of the `if` statement. For example, tests that evaluate the condition to `True` and/or `False`."
+    "Write assertions in `test_calculate_area` that can verify that method `calculate_area` is free of bugs. Make sure you include meaningful messages in case a test fails. Try to write tests that test the boundary values of the `if` statement. For example, tests that evaluate the condition to `True` and/or `False`."
    ]
   },
   {

book/08/handling_errors.ipynb

@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## 8.4 Handling errors: the `try - except` block <a id='try_except'></a>\n",
+    "# Handling errors: the `try - except` block <a id='try_except'></a>\n",
     "If exceptions are not handled properly, the application will crash during execution as we have seen in the examples above. As a result, handling exceptions is important, because we want to minimise application crashes. Sometimes this is called \"catching\" errors.\n",
     "\n",
     "It is important to also think about *when* we should catch errors: this is when you expect the error to be _recoverable_. In other words, dealing with isthe error should not affect future code that will run. Some errors are _fatal_ and should be left to crash the program since things won't work out anyways (we will learn how to distinguish this behavior in the logging section).\n",