Fix structure-templates for Org 9.2

The <el TAB shortcut has migrated to a dedicated package with a
different syntax.

global.org

@@ -843,14 +843,21 @@
 ;     ("\\subparagraph{%s}" . "\\subparagraph*{%s}")))
 #+END_SRC
 *** Source blocks
-    Add template for a source block in emacs-lisp. This is useful for
-    writing the emacs init file in literate form
+    Add template for a source block in a few selected languages; for
+    now I have
+    - emacs-lisp
+    - shell
+    . This is useful for writing the emacs init file in literate form,
+    or dotfiles for other code.  Since Org 9.2, the behavior that I
+    grew accustomed to (e.g. ~<el TAB~) )is implemented by
+ ~org-tempo~, so I need to require that as well.
     #+BEGIN_SRC emacs-lisp
       (mapcar (lambda (structure-template)
                 (add-to-list 'org-structure-template-alist
                              structure-template))
-              '(("el" "#+BEGIN_SRC emacs-lisp\n?\n#+END_SRC")
-                ("sh" "#+BEGIN_SRC sh\n?\n#+END_SRC")))
+              '(("el" . "src emacs-lisp")
+                ("sh" . "src sh")))
+      (require 'org-tempo)
     #+END_SRC
     Fontify src blocks
     #+BEGIN_SRC emacs-lisp