Fix typo in documentation of anonymousCoward name configuration

Change-Id: Ie6e205de70a4e8c7f5a4df3622984522f8797e13
diff --git a/Documentation/config-gerrit.txt b/Documentation/config-gerrit.txt
index 4d77abe..8d2cfe9 100644
--- a/Documentation/config-gerrit.txt
+++ b/Documentation/config-gerrit.txt
@@ -2942,7 +2942,7 @@
 
 [[user.anonymousCoward]]user.anonymousCoward::
 +
-Username that this displayed in the Gerrit WebUI and in e-mail
+Username that is displayed in the Gerrit WebUI and in e-mail
 notifications if the full name of the user is not set.
 +
 By default "Anonymous Coward" is used.