Fixes #65281: Treat the presence of \w as an indicator of a multiline regex search string

src/vs/editor/common/model/textModelSearch.ts

@@ -85,7 +85,7 @@ export function isMultilineRegexSource(searchString: string): boolean {
 			}
 
 			const nextChCode = searchString.charCodeAt(i);
-			if (nextChCode === CharCode.n || nextChCode === CharCode.r || nextChCode === CharCode.W) {
+			if (nextChCode === CharCode.n || nextChCode === CharCode.r || nextChCode === CharCode.W || nextChCode === CharCode.w) {
 				return true;
 			}
 		}

src/vs/editor/test/common/model/textModelSearch.test.ts

@@ -721,6 +721,20 @@ suite('TextModelSearch', () => {
 		);
 	});
 
+	test('issue #65281. \w should match line break.', () => {
+		assertFindMatches(
+			[
+				'this/is{',
+				'a test',
+				'}',
+			].join('\n'),
+			'this/\\w*[^}]*', true, false, null,
+			[
+				[1, 1, 3, 1]
+			]
+		);
+	});
+
 	test('Simple find using unicode escape sequences', () => {
 		assertFindMatches(
 			regularText.join('\n'),