Doc: Fix bad quoting

Change-Id: I4c8880ab94830e297304e2ae04783a4a7229860f

src/main/resources/Documentation/config.md

diff --git a/src/main/resources/Documentation/config.md b/src/main/resources/Documentation/config.md
index af0ec61..c24adb3 100644
--- a/src/main/resources/Documentation/config.md
+++ b/src/main/resources/Documentation/config.md
@@ -19,7 +19,7 @@
   file = ?p=${project}
 ```
 
-Note that the `project, ``branch`, `revision` and `filehistory` settings
+Note that the `project`, `branch`, `revision` and `filehistory` settings
 must all be specified, otherwise Gerrit will disable the configuration.
 
 Usage in other GWT or JavaScript UI