Update installation.rst

KatharinaSt · weaverryan · commit 55c348067879 · 2013-09-24T21:53:52.000-05:00
Fixed typo at second position.
diff --git a/book/installation.rst b/book/installation.rst
@@ -246,7 +246,7 @@ If there are any issues, correct them now before moving on.
     Some systems don't support ``chmod +a``, but do support another utility
     called ``setfacl``. You may need to `enable ACL support`_ on your partition
     and install setfacl before using it (as is the case with Ubuntu). This
-    uses a command to try to determine your web server user and set is as
+    uses a command to try to determine your web server user and set it as
     ``APACHEUSER``:
 
     .. code-block:: bash
