Fix dollar sign replacement bug in file editing (#7703)

packages/core/src/tools/smart-edit.ts

@@ -30,26 +30,7 @@ import {
 } from './modifiable-tool.js';
 import { IdeClient, IDEConnectionStatus } from '../ide/ide-client.js';
 import { FixLLMEditWithInstruction } from '../utils/llm-edit-fixer.js';
-
-export function applyReplacement(
-  currentContent: string | null,
-  oldString: string,
-  newString: string,
-  isNewFile: boolean,
-): string {
-  if (isNewFile) {
-    return newString;
-  }
-  if (currentContent === null) {
-    // Should not happen if not a new file, but defensively return empty or newString if oldString is also empty
-    return oldString === '' ? newString : '';
-  }
-  // If oldString is empty and it's not a new file, do not modify the content.
-  if (oldString === '' && !isNewFile) {
-    return currentContent;
-  }
-  return currentContent.replaceAll(oldString, newString);
-}
+import { applyReplacement } from './edit.js';
 
 interface ReplacementContext {
   params: EditToolParams;