Commit 09051a6

@@ -9,6 +9,8 @@ Chapter 2:
 4. Write an algorithm that gets the price for item A plus the quantity
    purchased. The algorithm prints the total cost, including 6% sales tax.
 
+    Pseudocode
+
     ```plaintext
     Get values for `price` and `quantity`
     Set the value of `tax` to 1.06
@@ -16,9 +18,11 @@ Chapter 2:
     Print the value of `total`
     ```
 
+    Ruby code
+
     ```ruby
     def calculate_total(price, quantity, tax = 0.06)
-      return (price * quantity) * (1.0 + tax)
+      (price * quantity) * (1.0 + tax)
     end
     ```
 
@@ -27,6 +31,8 @@ Chapter 3:
 21. Use the binary search algorithm to decide whether 35 is in the following
     list: `3, 6, 7, 9, 12, 14, 18, 21, 22, 31, 43`
 
+    Pseudocode
+
     ```plaintext
     Get the list of numbers and assign to variable `items`
     Get the target number and assign to variable `target`
@@ -54,6 +60,8 @@ Chapter 3:
     stop
     ```
 
+    Ruby code
+
     ```ruby
     def bsearch(target, items)
       min = 0