Fix formatting of config-gerrit

Change-Id: Ia3c5a4be1dd9adc89369e0a28661366db63f9bf4
diff --git a/Documentation/config-gerrit.txt b/Documentation/config-gerrit.txt
index 038350d..e5a0e08 100644
--- a/Documentation/config-gerrit.txt
+++ b/Documentation/config-gerrit.txt
@@ -84,9 +84,7 @@
 * h, hr, hour, hours
 
 +
---
 If a unit suffix is not specified, `milliseconds` is assumed.
-
 Default is `30 seconds`.
 
 [[accounts]]