4.1: the review's test and comment fixes

src/adf/document.ts

@@ -72,7 +72,7 @@ export function isAdfMark(value: unknown): value is AdfMark {
   return !('attrs' in value) || isAttributes(value['attrs'])
 }
 
-export function nodeAttrs(node: { attrs?: AdfAttributes }): AdfAttributes {
+export function nodeAttrs(node: { attrs?: AdfAttributes }): Readonly<AdfAttributes> {
   return node.attrs ?? {}
 }
 

src/adf/editor-normal.test.ts

@@ -14,6 +14,7 @@ test('merges adjacent text nodes carrying identical marks, at every level', () =
     { text: 'e', type: 'text' },
     { attrs: { localId: '01a0a06b-5281-7f27-9022-8d3a74b0ab0d' }, text: 'f', type: 'text' },
     { text: 'g', type: 'text' },
+    { attrs: {}, text: 'h', type: 'text' },
   ]
   assert.deepEqual(toEditorNormal({ content: [{ attrs: { panelType: 'info' }, content: [{ content, type: 'paragraph' }], type: 'panel' }], type: 'doc', version: 1 }), {
     content: [
@@ -27,7 +28,7 @@ test('merges adjacent text nodes carrying identical marks, at every level', () =
               { type: 'hardBreak' },
               { text: 'e', type: 'text' },
               { attrs: { localId: '01a0a06b-5281-7f27-9022-8d3a74b0ab0d' }, text: 'f', type: 'text' },
-              { text: 'g', type: 'text' },
+              { text: 'gh', type: 'text' },
             ],
             type: 'paragraph',
           },

src/adf/editor-normal.ts

@@ -11,7 +11,6 @@ export function sameMark(candidate: AdfMark, mark: AdfMark): boolean {
   return markKey(candidate) === markKey(mark)
 }
 
-// AGENTS.md §2: adjacent text nodes carrying identical marks and no attributes are one node.
 export function mergeAdjacentText(nodes: readonly AdfNode[]): AdfNode[] {
   const merged: AdfNode[] = []
   for (const node of nodes) {