Improve documentation

Author: lukaslihotzki

guide/src/reference/cli.md

@@ -107,14 +107,16 @@ Don't add WebAssembly fallback imports in generated JavaScript.
 
 ### `--split-linked-modules`
 
-Controls whether wasm-bindgen will split linked modules out into their own files.
-Enabling this is recommended, because it allows lazy loading and setting a
-stricter Content Security Policy.
-
-wasm-bindgen uses the `new URL('…', import.meta.url)` syntax to link such split
-out files. This is directly supported when using webpack 5 or no bundler at all.
-
-For other bundlers, ensure they support the link syntax, possibly by enabling an
-extra plugin. That's why this option is disabled by default. Alternatively,
-configure the bundler to keep the link syntax as is and to copy all files in
-`snippets/` to the output directory preserving their paths.
+Controls whether wasm-bindgen will split linked modules out into their own
+files. Enabling this is recommended, because it allows lazy-loading the linked
+modules and setting a stricter Content Security Policy.
+
+wasm-bindgen uses the `new URL('…', import.meta.url)` syntax to resolve the
+links to such split out files. This breaks with most bundlers, since the
+bundler doesn't know to include the linked module in its output. That's why
+this option is disabled by default. Webpack 5 is an exception, which has
+special treatment for that syntax. For other bundlers, you'll need to take
+extra steps to get it to work, likely by using a plugin. Alternatively, you can
+leave the syntax as is and instead manually configure the bundler to copy all
+files in `snippets/` to the output directory, preserving their paths relative
+to whichever bundled file ends up containing the JS shim.