[1.5.x] Added sphinx substitutions in place of hardcoded version numbers.

Refs #19571

Backport of 1884868adc from master

docs/intro/install.txt

@@ -78,11 +78,13 @@ Verifying
 ---------
 
 To verify that Django can be seen by Python, type ``python`` from your shell.
-Then at the Python prompt, try to import Django::
+Then at the Python prompt, try to import Django:
+
+.. parsed-literal::
 
     >>> import django
     >>> print(django.get_version())
-    1.5
+    |version|
 
 You may have another version of Django installed.
 
@@ -90,6 +92,3 @@ That's it!
 ----------
 
 That's it -- you can now :doc:`move onto the tutorial </intro/tutorial01>`.
-
-
-

docs/intro/tutorial01.txt

@@ -127,13 +127,15 @@ The development server
 
 Let's verify this worked. Change into the outer :file:`mysite` directory, if
 you haven't already, and run the command ``python manage.py runserver``. You'll
-see the following output on the command line::
+see the following output on the command line:
+
+.. parsed-literal::
 
     Validating models...
 
     0 errors found
-    January 06, 2013 - 15:50:53
-    Django version 1.5, using settings 'mysite.settings'
+    |today| - 15:50:53
+    Django version |version|, using settings 'mysite.settings'
     Development server is running at http://127.0.0.1:8000/
     Quit the server with CONTROL-C.