Update example in TOC footer

cc21c06e · Austin Clements · 588644f4 · cc21c06e
--- a/toc.ftr
+++ b/toc.ftr
@@ -6,9 +6,8 @@ on the same line as the name, the line number (or, in a few cases, numbers)
 where the name is defined.  Successive lines in an entry list the line
 numbers where the name is used.  For example, this entry:
-    swtch 2208
+    swtch 2308
-        0318 1928 1967 2207
+        0317 2128 2166 2307 2308
-        2208
-indicates that swtch is defined on line 2208 and is mentioned on five lines
+indicates that swtch is defined on line 2308 and is mentioned on five lines
-on sheets 03, 19, and 22.
+on sheets 03, 21, and 23.