Merge branch 'refs/heads/develop' into feature/unit-tests

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	user_guide/helpers/number_helper.html

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diff --git a/user_guide_src/source/installation/upgrade_131.rst b/user_guide_src/source/installation/upgrade_131.rst
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+###########################
+Upgrading from 1.3 to 1.3.1
+###########################
+
+.. note:: The instructions on this page assume you are running version
+	1.3. If you have not upgraded to that version please do so first.
+
+Before performing an update you should take your site offline by
+replacing the index.php file with a static one.
+
+Step 1: Update your CodeIgniter files
+=====================================
+
+Replace the following directories in your "system" folder with the new
+versions:
+
+.. note:: If you have any custom developed files in these folders please
+	make copies of them first.
+
+-  drivers
+-  init/init_unit_test.php (new for 1.3.1)
+-  language/
+-  libraries
+-  scaffolding
+
+Step 2: Update your user guide
+==============================
+
+Please also replace your local copy of the user guide with the new
+version.