Get rid of single-line if statements

Change-Id: I2b603563c650e83354af95ee6fb2fb4c9134fe86
diff --git a/tests/mock/sysrepo_subscription.cpp b/tests/mock/sysrepo_subscription.cpp
index 0d4fe33..c74d7af 100644
--- a/tests/mock/sysrepo_subscription.cpp
+++ b/tests/mock/sysrepo_subscription.cpp
@@ -24,8 +24,9 @@
         auto xpath = "/"s + module_name + ":*";
         auto it = sess->get_changes_iter(xpath.c_str());
 
-        if (event == SR_EV_APPLY)
+        if (event == SR_EV_APPLY) {
             return SR_ERR_OK;
+        }
 
         while (auto change = sess->get_change_next(it)) {
             auto xpath = (change->new_val() ? change->new_val() : change->old_val())->xpath();