diff --git a/doc/sphinx/book/box/box_space.rst b/doc/sphinx/book/box/box_space.rst
index 23c1ac28329fb7edcfd42b860ca5c1317234c44c..e64343628a84977c25bc4cfb28537dd6d9c420c4 100644
--- a/doc/sphinx/book/box/box_space.rst
+++ b/doc/sphinx/book/box/box_space.rst
@@ -339,10 +339,10 @@ A list of all ``box.space`` functions follows, then comes a list of all
         |
         | :codenormal:`-- In the following update ...`
         | :codenormal:`--    The idea is to delete field[2], then subtract 3 from field[3], but ...`
-        | :codenormal:`--    after the delete, there is a renumbering -- so field[3] becomes field[2]`
+        | :codenormal:`--    after the delete, there is a renumbering, so field[3] becomes field[2]`
         | :codenormal:`--    before we subtract 3 from it, and that's why the seventh argument is 2 not 3.`
         | :codenormal:`--    Therefore, after the following update, field[1] = 999, field[2] = 0.`
-        | :codenormal:`box.space.tester:update({999}, {{'-- ', 2, 1}, {'-', 2, 3}})`
+        | :codenormal:`box.space.tester:update({999}, {{'#', 2, 1}, {'-', 2, 3}})`
         |
         | :codenormal:`-- In the following update ...`
         | :codenormal:`--    We're making a long string so that splice will work in the next example.`
diff --git a/doc/sphinx/book/index.rst b/doc/sphinx/book/index.rst
index 4966cbdf13fb9b7799671a7e0f1b62131d7670a3..ba083f5fecddec037d62c368f927b131edbfe8c3 100644
--- a/doc/sphinx/book/index.rst
+++ b/doc/sphinx/book/index.rst
@@ -18,3 +18,4 @@
     app_b_proctitle
     app_c_lua_tutorial
     app_d_plugins
+    sophia