Add multi-inline extension script to tutorial

It's useful to have an example of an extension script that handles
multiple types of things.  It's also good to show that scripts can
handle data types other than strings, and can chase an address to
format data items elsewhere in the code.

This required updating the tutorial binary, adding the new script,
and updating the tutorial text and associated screen shots.

docs/sgtutorial/extension-scripts.html

@@ -131,11 +131,11 @@
 <div class="grid-container">
     <div class="grid-item-text">
         <p>Double-click the <code>JSR</code> opcode on line $1000
-        to jump to address $1026.  The only thing there is an <code>RTS</code>.
+        to jump to address $1036.  The only thing there is an <code>RTS</code>.
         It's supposed to be a routine that prints a string with a leading length
         byte, but for the sake of keeping the example code short it's just a
         place-holder.  Use the curly toolbar arrow
-        (or <kbd class="key">Alt+LeftArrow</kbd>) to jump back to $1026.</p>
+        (or <kbd class="key">Alt+LeftArrow</kbd>) to jump back to $1000.</p>
     </div>
 </div>
 
@@ -145,7 +145,7 @@
     </div>
     <div class="grid-item-text">
         <p>This time, double-click the <code>JSR</code> <i>operand</i>
-        ("<samp>L1026</samp>") to edit the operand.
+        ("<samp>L1036</samp>") to edit the operand.
         Click <samp>Create Label</samp>, and enter <kbd>PrintInlineL1String</kbd>.
         Remember that labels are case-sensitive;
         you must enter it exactly as shown.  Hit <samp>OK</samp> to accept the label,
@@ -189,12 +189,56 @@
         <img src="images/t4-inlinenull-done.png" alt="t4-inlinenull-done"/>
     </div>
     <div class="grid-item-text">
-        <p>Double-click the operand on line $100D ("<code>L1027</code>"),
+        <p>Double-click the operand on line $100D ("<code>L1037</code>"),
         click <samp>Create Label</samp>,
         and set the label to "<kbd>PrintInlineNullStringOne</kbd>".
         Hit <samp>OK</samp> twice.  That formatted the first one and got us
         to the next <code>JSR</code>.  Repeat the process on line $1019
-        ("<code>L1028</code>"), setting the label to "<kbd>PrintInlineNullStringTwo</kbd>".</p>
+        ("<code>L1038</code>"), setting the label to "<kbd>PrintInlineNullStringTwo</kbd>".</p>
+    </div>
+</div>
+
+<div class="grid-container">
+    <div class="grid-item-image">
+        <img src="images/t4-inlinemulti-before.png" alt="t4-inlinemulti-before"/>
+    </div>
+    <div class="grid-item-text">
+        <p>Things are looking good, but we've got one left, and it's got a
+        twist.  Instead of a string, the <code>JSR</code> at $1025 is followed by a
+        pointer to a string.  We'd like to format the pointer as an address,
+        and then format the string it points to.</p>
+    </div>
+</div>
+
+<div class="grid-container">
+    <div class="grid-item-image">
+        <img src="images/t4-inlinemulti-src.png" alt="t4-inlinemulti-src"/>
+    </div>
+    <div class="grid-item-text">
+        <p>We're going to add a third extension script.  Sometimes it's
+        convenient to collect all inline data handlers for a project into a
+        single script, so we'll demonstrate that here.  The new script handles
+        the previous two cases as well as this new case.
+        Go into Project
+        Properties, click the Extension Scripts tab, select the two scripts
+        you added earlier, and click Remove.  Then add the script "InlineMulti.cs"
+        from the project directory.  Click <samp>OK</samp> twice.  Note that
+        the strings formatted earlier remain formatted.</p>
+    </div>
+</div>
+
+<div class="grid-container">
+    <div class="grid-item-image">
+        <img src="images/t4-inlinemulti-done.png" alt="t4-inlinemulti-done"/>
+    </div>
+    <div class="grid-item-text">
+        <p>Double-click the operand on line $1025 ("<code>L1039</code>"),
+        click <samp>Create Label</samp>,
+        and set the label to "<kbd>PrintInlineAddrString</kbd>".
+        Hit <samp>OK</samp> twice.  This formatted the address at $1028,
+        and also formatted the string at $102b as a null-terminated string.
+        Because the bytes were formatted as an address and not a just a
+        16-bit value, a label was generated automatically.</p>
     </div>
 </div>