299 pipi pronoun consistency

src/pages/Exercise1.tsx

@@ -16,7 +16,8 @@ const Exercise1: FC = () => {
           <h1>Memory Addresses</h1>
           <p>
             Pipi has forgotten the address of the boxes in the warehouse! Help
-            his find the correct addresses by answering the following questions.
+            them find the correct addresses by answering the following
+            questions.
           </p>
           <h2>Instructions</h2>
           <p>Use the diagram below to answer the following questions.</p>
@@ -30,7 +31,7 @@ const Exercise1: FC = () => {
           </h2>
           <div className="questions">
             <Question
-              correct="Correct! This is the first address for box b, which is what pointers use to find variables in memory. Now Pipi needs to calculate how much he needs to move to get there."
+              correct="Correct! This is the first address for box b, which is what pointers use to find variables in memory. Now Pipi needs to calculate how much they need to move to get there."
               incorrect="Not Quite. Remember that pointers start with the first address of a variable, so we want to start with the first adress of box b. Please try again."
               correct_answer={correctAnswer}
               index={0}
@@ -52,7 +53,7 @@ const Exercise1: FC = () => {
               </p>
             </Question>
             <Question
-              correct="Correct! Pipi needs to move from address 2 to address 11. Now Pipi needs to go to a different box."
+              correct="Correct! Pipi needs to move from address 2 to address 11. Now they need to go to a different box."
               incorrect="Not Quite. Pipi needs to move from address 2 to address 11. Please try again."
               correct_answer={correctAnswer}
               index={1}
@@ -72,17 +73,18 @@ const Exercise1: FC = () => {
                     />
                   </span>
                 </span>{' '}
-                addresses from his current position to get to Box b.
+                addresses from their current position to get to Box b.
               </p>
             </Question>
           </div>
           <h2>
             What if Pipi now wants to go to{' '}
-            <span className="highlight">Box e</span> from his current position?
+            <span className="highlight">Box e</span> from their current
+            position?
           </h2>
           <div className="questions">
             <Question
-              correct="Correct! This is the first address for box e, which is what pointers use to find variables in memory. Now Pipi needs to calculate how much he needs to move to get there."
+              correct="Correct! This is the first address for box e, which is what pointers use to find variables in memory. Now Pipi needs to calculate how much they need to move to get there."
               incorrect="Not Quite. Remember that pointers start with the first address of a variable, so we want to start with the first adress of box b. Please try again."
               correct_answer={correctAnswer}
               index={2}
@@ -124,7 +126,7 @@ const Exercise1: FC = () => {
                     />
                   </span>
                 </span>{' '}
-                addresses from his current position to get to Box e.
+                addresses from their current position to get to Box e.
               </p>
             </Question>
           </div>

src/pages/Lesson1.tsx

@@ -16,14 +16,14 @@ const Lesson1: FC = () => {
             As you can see from the example, our warehouse had a bunch of
             labeled shelves, and there were some boxes on each of the shelves.
             Our helpful little robot friend was tasked with finding a particular
-            box to visit. But how did he know where to find the box he needed?
-            Well luckily for him, he has you to count on! You could see the box
-            he needed to go to, and you told him the address he needed to visit
-            if he wanted to find his box. That's why it was really
-            important to label our shelves with addresses - it made it much
-            easier for PiPi to know where to go. It's the same reason why
-            houses have addresses - an address gives you an easy way of
-            describing where something is located, so you can find it more
+            box to visit. But how did they know where to find the box they
+            needed? Well luckily for them, they have you to count on! You could
+            see the box they needed to go to, and you told them the address they
+            needed to visit if they wanted to find their box. That's why it
+            was really important to label our shelves with addresses - it made
+            it much easier for PiPi to know where to go. It's the same
+            reason why houses have addresses - an address gives you an easy way
+            of describing where something is located, so you can find it more
             easily. It would be much harder to find your friend's house if
             you didn't know what their address was! For the same reasons,
             the memory in your computer is also labeled with addresses.

src/pages/Lesson2_1.tsx

@@ -32,9 +32,9 @@ const Lesson2_1: FC = () => {
         <div className="page-wrapper">
           <h1>Introducing Pointers</h1>
           <p>
-            In our example, Pipi wanted to go to a box but he didn&apos;t know
+            In our example, Pipi wanted to go to a box but they didn&apos;t know
             where to find it. You passed along a piece of paper with a helpful
-            little note on it, telling Pipi the address of the box he was
+            little note on it, telling Pipi the address of the box they were
             looking for. This is basically what a pointer does! A pointer is a
             variable that stores a memory address.
           </p>

src/pages/Lesson3.tsx

@@ -66,7 +66,7 @@ const Lesson3: FC = () => {
           <p>
             The <span className="code">&</span> operator gives you the address
             of any variable you&apos;ve created. In our warehouse, it&apos;s
-            like Pipi asking you for the address of the box he wants to go to.
+            like Pipi asking you for the address of the box they want to go to.
             Or it&apos;s like searching on Google for the address of a
             restaurant you want to go to.
           </p>

src/pages/Lesson4.tsx

@@ -42,7 +42,7 @@ const Lesson4: FC = () => {
             memory address, our computer will go to that address in memory and
             return to us the value stored there. This is known as{' '}
             <u>dereferencing</u>. In our example, this is like giving Pipi an
-            address, him going to the box at that address, and telling us
+            address, going to the box at that address, and telling us
             what&apos;s inside the box.
           </p>
           <div className="diagram">