refactor: feedback code suggestions

packages/extester/src/cli.ts

@@ -82,10 +82,10 @@ program
 	.action(
 		withErrors(async (id, ids, cmd) => {
 			const extest = new ExTester(cmd.storage, codeStream(cmd.type), cmd.extensions_dir);
-			await extest.installFromMarketplace(id,  cmd.pre_release);
+			await extest.installFromMarketplace(id, cmd.pre_release);
 			if (ids && ids.length > 0) {
 				for (const idx of ids) {
-					await extest.installFromMarketplace(idx);
+					await extest.installFromMarketplace(idx, cmd.pre_release);
 				}
 			}
 		}),

packages/extester/src/extester.ts

@@ -127,7 +127,7 @@ export class ExTester {
 	 * Install an extension from VS Code marketplace into the test instance
 	 * @param id id of the extension to install
 	 */
-	async installFromMarketplace(id: string, preRelease = false): Promise<void> {
+	async installFromMarketplace(id: string, preRelease?: boolean): Promise<void> {
 		return this.code.installExtension(undefined, id, preRelease);
 	}
 

packages/extester/src/util/codeUtil.ts

@@ -154,7 +154,7 @@ export class CodeUtil {
 	/**
 	 * Install your extension into the test instance of VS Code
 	 */
-	installExtension(vsix?: string, id?: string, preRelease = false): void {
+	installExtension(vsix?: string, id?: string, preRelease?: boolean): void {
 		const pjson = require(path.resolve('package.json'));
 		if (id) {
 			return this.installExt(id, preRelease);
@@ -186,10 +186,10 @@ export class CodeUtil {
 		}
 	}
 
-	private installExt(pathOrID: string, preRelease = false): void {
+	private installExt(pathOrID: string, preRelease?: boolean): void {
 		let command = `${this.getCliInitCommand()} --force --install-extension "${pathOrID}"`;
-		if(preRelease){
-			command += " --pre-release";
+		if (preRelease) {
+			command += ' --pre-release';
 		}
 		if (this.extensionsFolder) {
 			command += ` --extensions-dir=${this.extensionsFolder}`;