Apply suggestions from code review

ch02data/061internet.ipynb.py

@@ -60,7 +60,7 @@
 # **Supplementary materials**: The code used to replace each character is the [ASCII](http://www.asciitable.com) code for it.
 
 # %% [markdown]
-# **Supplementary materials**: The escaping rules are quite subtle. See [the Wikipedia article on percent-encoding](https://en.wikipedia.org/wiki/Percent-encoding).
+# **Supplementary materials**: The escaping rules are quite subtle. See [the Wikipedia article on percent-encoding](https://en.wikipedia.org/wiki/Percent-encoding). The standard library provides the [urlencode](https://docs.python.org/3/library/urllib.parse.html#urllib.parse.urlencode) function that can take care of this for you.
 
 # %% [markdown]
 # ## Requests

ch02data/066QuakeExercise.ipynb.py

@@ -12,7 +12,7 @@
 # ---
 
 # %% [markdown]
-# # Extended exercise: the biggest earthquake in the UK this century
+# # Classroom exercise: the biggest earthquake in the UK this century
 #
 # ## USGS earthquake catalog
 #

ch02data/082NumPy.ipynb.py

@@ -94,7 +94,7 @@
 my_array.append(4)
 
 # %% [markdown]
-# NumPy arrays do not provide an `append` method. For NumPy arrays it is generally expected that you will not change the *size* of an array once it has been defined and the way arrays are stored in memory would make such resize operations inefficient. Python lists on the other can be efficiently appended to, joined and split. However, you gain a lot of functionality in return for this limitation.
+# For NumPy arrays it is generally expected that you will not change the *size* of an array once it has been defined and the way arrays are stored in memory would make such resize operations inefficient. Python lists on the other can be efficiently appended to, joined and split. However, you gain a lot of functionality in return for this limitation.
 #
 # ## Array creation routines
 #