Minor fix with electronic receipt a11y statement.
--- a/latest/use-cases/index.html Wed May 20 01:43:51 2015 -0400
+++ b/latest/use-cases/index.html Wed May 20 01:45:12 2015 -0400
@@ -2128,8 +2128,8 @@
</dd>
<dt>Accessibility</dt>
<dd>
-Protecting digital receipts may have an unintended consequence of degrading
-or prevent their use with accessibility technology. It is important that
+Protecting digital receipts may have the unintended consequence of degrading
+or preventing their use with accessibility technology. It is important that
protection measures do not prevent accessibility technology from reading
pertinent information about the transaction.
</dd>