Fix doc comments about Super nodes

Author: amomchilov

parser/prism/Translator.cc

@@ -2262,7 +2262,9 @@ unique_ptr<parser::Node> Translator::translate(pm_node_t *node, bool preserveCon
             // Desugared in desugarParametersNode().
             return make_unique<parser::ForwardArg>(location);
         }
-        case PM_FORWARDING_SUPER_NODE: { // `super` with no `(...)`
+        case PM_FORWARDING_SUPER_NODE: { // A `super` with no explicit arguments
+            // It might have a literal block argument, though.
+
             auto forwardingSuperNode = down_cast<pm_forwarding_super_node>(node);
 
             // There's no `keyword_loc` field, so we make it ourselves from the start location.
@@ -3170,7 +3172,9 @@ unique_ptr<parser::Node> Translator::translate(pm_node_t *node, bool preserveCon
 
             return make_node_with_expr<parser::String>(MK::String(location, content), location, content);
         }
-        case PM_SUPER_NODE: { // The `super` keyword, like `super`, `super(a, b)`
+        case PM_SUPER_NODE: { // A `super` call with explicit args, like `super()`, `super(a, b)`
+            // If there's no arguments (except a literal block argument), then it's a `PM_FORWARDING_SUPER_NODE`.
+
             auto superNode = down_cast<pm_super_node>(node);
 
             auto blockArgumentNode = superNode->block;