[ostree] doc: Minor tweaks

[Colin Walters <walters src gnome org>]

commit 3aa8f86b4a18411dd63c0bea5963373908713585
Author: Colin Walters <walters verbum org>
Date:   Sun Aug 25 10:32:40 2013 -0400

    doc: Minor tweaks

 doc/overview.xml |    7 ++++---
 doc/repo.xml     |    6 +++---
 2 files changed, 7 insertions(+), 6 deletions(-)
---
diff --git a/doc/overview.xml b/doc/overview.xml
index 948f5c7..79763b5 100644
--- a/doc/overview.xml
+++ b/doc/overview.xml
@@ -79,9 +79,10 @@
       and <emphasis>predictable</emphasis>.
     </para>
     <para>
-      But unlike many default image-based deployments, OSTree
-      supports a persistent, writable <literal>/etc</literal> that
-      is preserved across upgrades.
+      But unlike many default image-based deployments, OSTree supports
+      exactly two persistent writable directories that are preserved
+      across upgrades: <literal>/etc</literal> and
+      <literal>/var</literal>.
     </para>
     <para>
       Because OSTree operates at the Unix filesystem layer, it works
diff --git a/doc/repo.xml b/doc/repo.xml
index dd49c28..5379d3a 100644
--- a/doc/repo.xml
+++ b/doc/repo.xml
@@ -8,9 +8,9 @@
   <chapter id="repository-intro">
     <title>Core object types and data model</title>
     <para>
-      OSTree is deeply inspired by git; like git, OSTree is a
-      userspace versioning filesystem.  It is worth taking some time
-      to familiarize yourself with <ulink
+      OSTree is deeply inspired by git; the core layer is a userspace
+      content-addressed versioning filesystem.  It is worth taking
+      some time to familiarize yourself with <ulink
       url="http://git-scm.com/book/en/Git-Internals";>Git
       Internals</ulink>, as this section will assume some knowledge of
       how git works.