Update comments

Author: markdalgleish

packages/react-router/lib/router/router.ts

@@ -5443,7 +5443,7 @@ async function callLoaderOrAction({
     // If we have a promise for a lazy route, await that first
     if (lazyHandlerPromise || lazyRoutePromise) {
       if (handler) {
-        // Run statically defined handler in parallel with lazy()
+        // Run statically defined handler in parallel with lazy route loading
         let handlerError;
         let [value] = await Promise.all([
           // If the handler throws, don't let it immediately bubble out,
@@ -5452,6 +5452,7 @@ async function callLoaderOrAction({
           runHandler(handler).catch((e) => {
             handlerError = e;
           }),
+          // Ensure all lazy route promises are resolved before continuing
           lazyHandlerPromise,
           lazyRoutePromise,
         ]);
@@ -5469,8 +5470,8 @@ async function callLoaderOrAction({
         if (handler) {
           // Handler still runs even if we got interrupted to maintain consistency
           // with un-abortable behavior of handler execution on non-lazy or
-          // previously-lazy-loaded routes. We also ensure the entire lazy
-          // route is loaded before continuing.
+          // previously-lazy-loaded routes. We also ensure all lazy route
+          // promises are resolved before continuing.
           [result] = await Promise.all([runHandler(handler), lazyRoutePromise]);
         } else if (type === "action") {
           let url = new URL(request.url);