Use lowercase drive names in backup file service tests

src/vs/workbench/services/backup/test/backupFileService.test.ts

@@ -50,10 +50,10 @@ suite('BackupFileService', () => {
 	const backupHome = path.join(parentDir, 'Backups');
 	const workspacesJsonPath = path.join(backupHome, 'workspaces.json');
 
-	const workspaceResource = Uri.file(platform.isWindows ? 'C:\\workspace' : '/workspace');
+	const workspaceResource = Uri.file(platform.isWindows ? 'c:\\workspace' : '/workspace');
 	const workspaceBackupPath = path.join(backupHome, crypto.createHash('md5').update(workspaceResource.fsPath).digest('hex'));
-	const fooFile = Uri.file(platform.isWindows ? 'C:\\foo' : '/foo');
-	const barFile = Uri.file(platform.isWindows ? 'C:\\bar' : '/bar');
+	const fooFile = Uri.file(platform.isWindows ? 'c:\\foo' : '/foo');
+	const barFile = Uri.file(platform.isWindows ? 'c:\\bar' : '/bar');
 	const untitledFile = Uri.from({ scheme: 'untitled', path: 'Untitled-1' });
 	const fooBackupPath = path.join(workspaceBackupPath, 'file', crypto.createHash('md5').update(fooFile.fsPath).digest('hex'));
 	const barBackupPath = path.join(workspaceBackupPath, 'file', crypto.createHash('md5').update(barFile.fsPath).digest('hex'));