Fix error message formatting

Change-Id: I55be09967549cee392db27582ee2adf99eb37a57
diff --git a/container-images/gerrit-replica/tools/start b/container-images/gerrit-replica/tools/start
index ad7788f..a1125fe 100755
--- a/container-images/gerrit-replica/tools/start
+++ b/container-images/gerrit-replica/tools/start
@@ -14,7 +14,7 @@
 
 IS_REPLICA=$(git config -f /var/gerrit/etc/gerrit.config --get container.replica)
 if [[ ! "$IS_REPLICA" == "true" ]]; then
-  echo "`container.replica` in `gerrit.config` has to be `true`"
+  echo "container.replica in gerrit.config has to be true"
   exit 1
 fi