esm: improve JSDoc annotation of internal functions

Co-authored-by: Geoffrey Booth <webadmin@geoffreybooth.com>

lib/internal/modules/run_main.js

@@ -30,7 +30,7 @@ function resolveMainPath(main) {
 
 /**
  * Determine whether the main entry point should be loaded through the ESM Loader.
- * @param {string} mainPath Absolute path to the main entry point
+ * @param {string} mainPath - Absolute path to the main entry point
  */
 function shouldUseESMLoader(mainPath) {
   /**
@@ -57,7 +57,7 @@ function shouldUseESMLoader(mainPath) {
 
 /**
  * Run the main entry point through the ESM Loader.
- * @param {string} mainPath Absolute path to the main entry point
+ * @param {string} mainPath - Absolute path for the main entry point
  */
 function runMainESM(mainPath) {
   const { loadESM } = require('internal/process/esm_loader');
@@ -72,7 +72,7 @@ function runMainESM(mainPath) {
 
 /**
  * Handle process exit events around the main entry point promise.
- * @param {Promise} promise Main entry point promise
+ * @param {Promise} promise - Main entry point promise
  */
 async function handleMainPromise(promise) {
   const {
@@ -90,7 +90,8 @@ async function handleMainPromise(promise) {
  * Parse the CLI main entry point string and run it.
  * For backwards compatibility, we have to run a bunch of monkey-patchable code that belongs to the CJS loader (exposed
  * by `require('module')`) even when the entry point is ESM.
- * @param {string} main CLI main entry point string
+ * Because of backwards compatibility, this function is exposed publicly via `import { runMain } from 'node:module'`.
+ * @param {string} main - Resolved absolute path for the main entry point, if found
  */
 function executeUserEntryPoint(main = process.argv[1]) {
   const resolvedMain = resolveMainPath(main);