Fixed double-space typo.
diff --git a/user_guide/installation/upgrade_170.html b/user_guide/installation/upgrade_170.html
index 01597a4..6fd92f5 100644
--- a/user_guide/installation/upgrade_170.html
+++ b/user_guide/installation/upgrade_170.html
@@ -88,14 +88,14 @@
<code>ALTER TABLE `ci_sessions` ADD `user_data` text NOT NULL</code>
-<p>You'll find more information regarding the new Session functionality in the <a href="../libraries/sessions.html">Session class</a> page.</p>
+<p>You'll find more information regarding the new Session functionality in the <a href="../libraries/sessions.html">Session class</a> page.</p>
<h2>Step 3: Update your Validation Syntax</h2>
-<p>This is an <strong>optional</strong>, but recommended step, for people currently using the Validation class. CI 1.7 introduces a new <a href="../libraries/form_validation.html">Form Validation class</a>, which
-deprecates the old Validation library. We have left the old one in place so that existing applications that use it will not break, but you are encouraged to
-migrate to the new version as soon as possible. Please read the user guide carefully as the new library works a little differently, and has several new features.</p>
+<p>This is an <strong>optional</strong>, but recommended step, for people currently using the Validation class. CI 1.7 introduces a new <a href="../libraries/form_validation.html">Form Validation class</a>, which
+deprecates the old Validation library. We have left the old one in place so that existing applications that use it will not break, but you are encouraged to
+migrate to the new version as soon as possible. Please read the user guide carefully as the new library works a little differently, and has several new features.</p>