Apply suggestions from code review

Co-authored-by: Victor Berchet <[email protected]>

Author: jasnell

src/content/docs/workers/configuration/environment-variables.mdx

@@ -106,8 +106,15 @@ Select the **Secret** type if your environment variable is a [secret](/workers/c
 
 ## Environment variables and Node.js compatibility
 
-When you enable both the [`nodejs_compat`](/workers/runtime-apis/nodejs/) and [`nodejs_compat_populate_process_env`](/workers/configuration/compatibility-flags/) compatibility
-flags, environment variables will also be available via the global `process.env`.
+When you enable both the [`nodejs_compat`](/workers/runtime-apis/nodejs/) and
+[`nodejs_compat_populate_process_env`](/workers/configuration/compatibility-flags/)
+compatibility flags, environment variables will also be available via the global
+`process.env`. Note that the `nodejs_compat_populate_process_env` flag is
+enabled automatically when `nodejs_compat` is used with a compatibility date
+on or after April 1st, 2025.
+
+The `process.env` will be populated lazily the first time that `process` is accessed
+in the worker.
 
 Text variable values are exposed directly.
 
@@ -119,11 +126,14 @@ JSON string.
 For example, imagine a Worker with three environment variables, one text value, and
 two JSON values:
 
-* `FOO` with plaintext value `abc`,
-* `BAR` with JSON value `"abc"`,
-* `BAZ` with JSON value `"{ "a": 123 }"`
+```
+[vars]
+FOO =  "abc"
+BAR =  "abc"
+BAZ = { "a": 123 }
+```
 
-Environment variables can be added using either the `wrangler.{json|toml}` file or via the Cloudflare
+Environment variables can be added using either the `wrangler.{json|jsonc|toml}` file or via the Cloudflare
 dashboard UI.
 
 The value of `process.env.FOO` will be the JavaScript string `"abc"`.