adjust comments

src/compiler/utils/namespaces.ts

@@ -1,5 +1,5 @@
-// the foreign namespace covers all DOM implementations that aren't html5. It opts out of html5 specific a11y checks 
+// The `foreign` namespace covers all DOM implementations that aren't HTML5.
-// and case insensitive attribute names
+// It opts out of HTML5-specific a11y checks and case-insensitive attribute names.
 export const foreign = 'https://svelte.dev/docs#svelte_options';
 export const html = 'http://www.w3.org/1999/xhtml';
 export const mathml = 'http://www.w3.org/1998/Math/MathML';
@@ -8,7 +8,6 @@ export const xlink = 'http://www.w3.org/1999/xlink';
 export const xml = 'http://www.w3.org/XML/1998/namespace';
 export const xmlns = 'http://www.w3.org/2000/xmlns';
 
-
 export const valid_namespaces = [
 	'foreign',
 	'html',

test/runtime/samples/attribute-casing-foreign-namespace-compiler-option/_config.js

@@ -1,4 +1,4 @@
-// Test support for the native namespaces preserving attribute case (eg svelte-native, svelte-nodegui).
+// Test support for the `foreign` namespace preserving attribute case.
 
 export default {
 	html: `

test/runtime/samples/attribute-casing-foreign-namespace/_config.js

@@ -1,4 +1,4 @@
-// Test support for the native namespaces preserving attribute case (eg svelte-native, svelte-nodegui).
+// Test support for the `foreign` namespace preserving attribute case.
 
 export default {
 	html: `