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

packages/core/src/tools/edit.test.ts

@@ -198,6 +198,22 @@ describe('EditTool', () => {
         'hello world',
       );
     });
+
+    it('should treat $ literally and not as replacement pattern', () => {
+      const current = "price is $100 and pattern end is ' '";
+      const oldStr = 'price is $100';
+      const newStr = 'price is $200';
+      const result = applyReplacement(current, oldStr, newStr, false);
+      expect(result).toBe("price is $200 and pattern end is ' '");
+    });
+
+    it("should treat $' literally and not as a replacement pattern", () => {
+      const current = 'foo';
+      const oldStr = 'foo';
+      const newStr = "bar$'baz";
+      const result = applyReplacement(current, oldStr, newStr, false);
+      expect(result).toBe("bar$'baz");
+    });
   });
 
   describe('validateToolParams', () => {