[1.8.x] Fixed #24657 -- Fixed include template tag example.

Thanks pattypatpat for the report.

Backport of f47c796b52 from master

docs/ref/templates/builtins.txt

@@ -672,9 +672,11 @@ the variable ``template_name``::
     your context.
 
 An included template is rendered within the context of the template that
-includes it. This example produces the output ``"Hello, John"``:
+includes it. This example produces the output ``"Hello, John!"``:
+
+* Context: variable ``person`` is set to ``"John"`` and variable ``greeting``
+  is set to ``"Hello"``.
 
-* Context: variable ``person`` is set to ``"john"``.
 * Template::
 
     {% include "name_snippet.html" %}