adding comment line for p

docs/docs/api/DiagnosticsChannel.md

@@ -210,7 +210,7 @@ This message is published when `fetch` is called, and will publish the arguments
 
 ```js
 import diagnosticsChannel from 'diagnostics_channel'
-diagnosticsChannel.channel('tracing:undici:fetch:start').subscribe(({ input, init }) => {
+diagnosticsChannel.channel('tracing:undici:fetch:start').subscribe(({ req, input, init, }) => {
   console.log('input', input)
   console.log('init', init)
 })
@@ -221,7 +221,7 @@ diagnosticsChannel.channel('tracing:undici:fetch:start').subscribe(({ input, ini
 This message is published at the end of `fetch`'s execution, and will publish any `error` from the synchronous part of `fetch`. Since `fetch` is asynchronous, this should be empty. This channel will publish the same values as `undici:fetch:start`, but we are including it to track when `fetch` finishes execution and to be consistent with [`TracingChannel`](https://nodejs.org/api/diagnostics_channel.html#class-tracingchannel).
 ```js
 import diagnosticsChannel from 'diagnostics_channel'
-diagnosticsChannel.channel('tracing:undici:fetch:end').subscribe(({ input, init, error }) => {
+diagnosticsChannel.channel('tracing:undici:fetch:end').subscribe(({ req, input, init, error }) => {
   console.log('input', input)
   console.log('init', init)
   console.log('error', error) // should be empty
@@ -231,7 +231,7 @@ diagnosticsChannel.channel('tracing:undici:fetch:end').subscribe(({ input, init,
 This message is published after `fetch` resolves or rejects. If `fetch` resolves, it publishes the response in `result`. If it rejects, it publishes the error in `error`.
 ```js
 import diagnosticsChannel from 'diagnostics_channel'
-diagnosticsChannel.channel('tracing:undici:fetch:asyncStart').subscribe(({ input, init, result, error }) => {
+diagnosticsChannel.channel('tracing:undici:fetch:asyncStart').subscribe(({ req, input, init, result, error }) => {
   console.log('input', input)
   console.log('init', init)
   console.log('response', result)
@@ -242,7 +242,7 @@ diagnosticsChannel.channel('tracing:undici:fetch:asyncStart').subscribe(({ input
 This channel gets published the same values as and at the same time as `tracing:undici:fetch:asyncStart` in the case of [`tracingChannel.tracePromise`](https://nodejs.org/api/diagnostics_channel.html#tracingchanneltracepromisefn-context-thisarg-args)
 ```js
 import diagnosticsChannel from 'diagnostics_channel'
-diagnosticsChannel.channel('tracing:undici:fetch:asyncEnd').subscribe(({ input, init, result, error }) => {
+diagnosticsChannel.channel('tracing:undici:fetch:asyncEnd').subscribe(({ req, input, init, result, error }) => {
   console.log('input', input)
   console.log('init', init)
   console.log('response', result)
@@ -253,7 +253,7 @@ diagnosticsChannel.channel('tracing:undici:fetch:asyncEnd').subscribe(({ input,
 This message is published when an error is thrown or promise rejects while calling `fetch`.
 ```js
 import diagnosticsChannel from 'diagnostics_channel'
-diagnosticsChannel.channel('tracing:undici:fetch:error').subscribe(({ input, init, error }) => {
+diagnosticsChannel.channel('tracing:undici:fetch:error').subscribe(({ req, input, init, error }) => {
   console.log('input', input)
   console.log('init', init)
   console.log('error', error)

lib/web/fetch/index.js

@@ -186,6 +186,8 @@ function createInstrumentedDeferredPromise (context) {
 function fetch (input, init = undefined) {
   webidl.argumentLengthCheck(arguments, 1, 'globalThis.fetch')
 
+  // 1. Let p be a new promise.
+
   // 2. Let requestObject be the result of invoking the initial value of
   // Request as constructor with input and init as arguments. If this throws
   // an exception, reject p with it and return p.