treewide: initialize empty structs with var

Change-Id: I72d3993eaf5fe57c77b1dda8218e36a8cc11813d
Reviewed-on: https://review.monogon.dev/c/monogon/+/3108
Tested-by: Jenkins CI
Reviewed-by: Serge Bazanski <serge@monogon.tech>
diff --git a/go/clitable/table_test.go b/go/clitable/table_test.go
index 5fca84c..447d83d 100644
--- a/go/clitable/table_test.go
+++ b/go/clitable/table_test.go
@@ -8,9 +8,9 @@
 
 // TestTableLayout performs a smoke test of the table layout functionality.
 func TestTableLayout(t *testing.T) {
-	tab := Table{}
+	var tab Table
 
-	e := Entry{}
+	var e Entry
 	e.Add("id", "short")
 	e.Add("labels", "")
 	tab.Add(e)