Minor gramatical fix.
@@ -67,7 +67,7 @@ value of the ``cookiecutter.module_name`` template variable:
Example: Validating template variables
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-Here is an example of script that validates a template variable
+Here is an example of a script that validates a template variable
before generating the project, to be used as ``hooks/pre_gen_project.py``:
.. code-block:: python
