trivial typos

doc/sphinx/book/app_c_lua_tutorial.rst

@@ -323,7 +323,7 @@ with two fields. The first field will be 1. The second field will be a random
 10-letter string. Once again the ``string_function(``) can be invoked from
 ``main_function()`` which can be invoked with ``main_function()!``. But
 ``main_function()`` won't tell the whole story, because it does not return t, it
-nly puts t into the database. To confirm that something got inserted, we'll use
+only puts t into the database. To confirm that something got inserted, we'll use
 a SELECT request.
 
 .. code-block:: lua

doc/sphinx/book/app_d_plugins.rst

@@ -76,7 +76,7 @@ mysqld server is already running on the local host 127.0.0.1.
     Query OK, 0 rows affected (0.13 sec)
     mysql> INSERT INTO test.test VALUES (1,'MySQL row');
     Query OK, 1 row affected (0.02 sec)
-    mysql> **QUIT**
+    mysql> QUIT
     Bye
 
     # Build the Tarantool server. Make certain that "cmake" gets the right