Re-add an accidentally removed line in skylark docgen
RELNOTES: None.
@@ -128,6 +128,7 @@ final class SkylarkDocumentationCollector {
while (!toProcess.isEmpty()) {
Class<?> c = toProcess.removeFirst();
SkylarkModuleDoc module = getSkylarkModuleDoc(c, modules);
+ done.add(c);
if (module.javaMethodsNotCollected()) {
ImmutableMap<Method, SkylarkCallable> methods =
