Minor fix phpcbf

Minor whitespace from https://github.com/FreshRSS/FreshRSS/pull/3721

app/install.php

@@ -655,7 +655,7 @@ if (_t('gen.dir') === 'rtl') {
 		<meta charset="UTF-8" />
 		<meta name="viewport" content="initial-scale=1.0" />
 		<script id="jsonVars" type="application/json">{}</script>
-		<title><?= _t('install.title') ?>: <?= _t('install.step', STEP+1) ?></title>
+		<title><?= _t('install.title') ?>: <?= _t('install.step', STEP + 1) ?></title>
 		<link rel="stylesheet" href="../themes/base-theme/template.css?<?= @filemtime(PUBLIC_PATH . '/themes/base-theme/template.css') ?>" />
 		<link rel="stylesheet" href="../themes/Origine/origine.css?<?= @filemtime(PUBLIC_PATH . '/themes/Origine/origine.css') ?>" />
 		<meta name="robots" content="noindex,nofollow" />
@@ -711,7 +711,7 @@ if (_t('gen.dir') === 'rtl') {
 	</nav>
 
 	<div class="post">
-		<h1><?= _t('install.title') ?>: <?= _t('install.step', STEP+1) ?></h1>
+		<h1><?= _t('install.title') ?>: <?= _t('install.step', STEP + 1) ?></h1>
 		<?php
 		switch (STEP) {
 		case 0: