Fixed typos in docs.

docs/internals/contributing/writing-code/coding-style.txt

@@ -12,7 +12,7 @@ Pre-commit checks
 `pre-commit <https://pre-commit.com>`_ is a framework for managing pre-commit
 hooks. These hooks help to identify simple issues before committing code for
 review. By checking for these issues before code review it allows the reviewer
-to focus on the change itself, and it can also help to reduce the number CI
+to focus on the change itself, and it can also help to reduce the number of CI
 runs.
 
 To use the tool, first install ``pre-commit`` and then the git hooks:

docs/ref/contrib/admin/index.txt

@@ -2272,7 +2272,7 @@ Adding custom validation to the admin
 
 You can also add custom validation of data in the admin. The automatic admin
 interface reuses :mod:`django.forms`, and the ``ModelAdmin`` class gives you
-the ability define your own form::
+the ability to define your own form::
 
     class ArticleAdmin(admin.ModelAdmin):
         form = MyArticleAdminForm