Fix documentation nits

Just minor spelling and grammar fixes.

Change-Id: I2dc98e4b68ac2df35fe1647cd4af3402cd55d77d
diff --git a/doc/source/admin/installation.rst b/doc/source/admin/installation.rst
index bc61f7e..ae7d571 100644
--- a/doc/source/admin/installation.rst
+++ b/doc/source/admin/installation.rst
@@ -30,7 +30,7 @@
 
 Gearman is a job distribution system that Zuul uses to communicate
 with its distributed components.  The Zuul scheduler distributes work
-to Zuul mergers and executors use Gearman.  You may supply your own
+to Zuul mergers and executors using Gearman.  You may supply your own
 gearman server, but the Zuul scheduler includes a built-in server
 which is recommended.  Ensure that all Zuul hosts can communicate with
 the gearman server.
@@ -56,7 +56,7 @@
 Nodepool uses Zookeeper to communicate internally among its
 components, and also to communicate with Zuul.  You can run a simple
 single-node Zookeeper instance, or a multi-node cluster.  Ensure that
-The host running the Zuul scheduler has access to the cluster.
+the host running the Zuul scheduler has access to the cluster.
 
 Ansible
 ~~~~~~~