Take advantage of PHP 5.4+ short echo (#2585)

* Take advantage of PHP 5.4+ short echo

https://php.net/migration54.new-features thanks to
https://github.com/FreshRSS/FreshRSS/pull/2495

Use `<?=  ?>` instead of `<?php echo; ?>`
10kB of code saved :-)

Done with regular expression:
```
<\?php echo (.+?);? *\?>
<?= \1 ?>
```

* Try Travis fix

https://github.com/squizlabs/PHP_CodeSniffer/issues/2045#issuecomment-395238272

1 files changed, 23 insertions, 23 deletions

diff --git a/app/views/configure/system.phtml b/app/views/configure/system.phtml
index eb0e68dfc..1a718e20f 100644
--- a/app/views/configure/system.phtml
+++ b/app/views/configure/system.phtml
@@ -1,31 +1,31 @@
 <?php $this->partial('aside_configure'); ?>
 
 <div class="post">
-	<a href="<?php echo _url('index', 'index'); ?>"><?php echo _t('gen.action.back_to_rss_feeds'); ?></a>
+	<a href="<?= _url('index', 'index') ?>"><?= _t('gen.action.back_to_rss_feeds') ?></a>
 
-	<form method="post" action="<?php echo _url('configure', 'system'); ?>">
-		<input type="hidden" name="_csrf" value="<?php echo FreshRSS_Auth::csrfToken(); ?>" />
-		<legend><?php echo _t('admin.system'); ?></legend>
+	<form method="post" action="<?= _url('configure', 'system') ?>">
+		<input type="hidden" name="_csrf" value="<?= FreshRSS_Auth::csrfToken() ?>" />
+		<legend><?= _t('admin.system') ?></legend>
 
 		<div class="form-group">
-			<label class="group-name" for="instance-name"><?php echo _t('admin.system.instance-name'); ?></label>
+			<label class="group-name" for="instance-name"><?= _t('admin.system.instance-name') ?></label>
 			<div class="group-controls">
-			    <input type="text" class="extend" id="instance-name" name="instance-name" value="<?php echo FreshRSS_Context::$system_conf->title; ?>" data-leave-validation="<?php echo FreshRSS_Context::$system_conf->title; ?>"/>
+			    <input type="text" class="extend" id="instance-name" name="instance-name" value="<?= FreshRSS_Context::$system_conf->title ?>" data-leave-validation="<?= FreshRSS_Context::$system_conf->title ?>"/>
 			</div>
 		</div>
 
 		<div class="form-group">
-			<label class="group-name" for="auto-update-url"><?php echo _t('admin.system.auto-update-url'); ?></label>
+			<label class="group-name" for="auto-update-url"><?= _t('admin.system.auto-update-url') ?></label>
 			<div class="group-controls">
-			    <input type="text" class="extend" id="auto-update-url" name="auto-update-url" value="<?php echo FreshRSS_Context::$system_conf->auto_update_url; ?>" data-leave-validation="<?php echo FreshRSS_Context::$system_conf->auto_update_url; ?>"/>
+			    <input type="text" class="extend" id="auto-update-url" name="auto-update-url" value="<?= FreshRSS_Context::$system_conf->auto_update_url ?>" data-leave-validation="<?= FreshRSS_Context::$system_conf->auto_update_url ?>"/>
 			</div>
 		</div>
 
 		<div class="form-group">
-			<label class="group-name" for="max-registrations"><?php echo _t('admin.system.registration.number'); ?></label>
+			<label class="group-name" for="max-registrations"><?= _t('admin.system.registration.number') ?></label>
 			<div class="group-controls">
-				<input type="number" id="max-registrations" name="max-registrations" value="<?php echo FreshRSS_Context::$system_conf->limits['max_registrations']; ?>" min="0" data-leave-validation="<?php echo FreshRSS_Context::$system_conf->limits['max_registrations']; ?>"/>
-				<?php echo _i('help'); ?> <?php echo _t('admin.system.registration.help'); ?>
+				<input type="number" id="max-registrations" name="max-registrations" value="<?= FreshRSS_Context::$system_conf->limits['max_registrations'] ?>" min="0" data-leave-validation="<?= FreshRSS_Context::$system_conf->limits['max_registrations'] ?>"/>
+				<?= _i('help') ?> <?= _t('admin.system.registration.help') ?>
 			</div>
 		</div>
 
@@ -47,41 +47,41 @@
 							name="force-email-validation"
 							id="force-email-validation"
 							value="1"
-							<?php echo FreshRSS_Context::$system_conf->force_email_validation ? 'checked="checked"' : ''; ?>
-							data-leave-validation="<?php echo FreshRSS_Context::$system_conf->force_email_validation; ?>"
+							<?= FreshRSS_Context::$system_conf->force_email_validation ? 'checked="checked"' : '' ?>
+							data-leave-validation="<?= FreshRSS_Context::$system_conf->force_email_validation ?>"
 						/>
-						<?php echo _t('admin.system.force_email_validation'); ?>
+						<?= _t('admin.system.force_email_validation') ?>
 					</label>
 				</div>
 			</div>
 		<?php } ?>
 
 		<div class="form-group">
-			<label class="group-name" for="max-feeds"><?php echo _t('admin.system.max-feeds'); ?></label>
+			<label class="group-name" for="max-feeds"><?= _t('admin.system.max-feeds') ?></label>
 			<div class="group-controls">
-			    <input type="number" id="max-feeds" name="max-feeds" value="<?php echo FreshRSS_Context::$system_conf->limits['max_feeds']; ?>" min="1" data-leave-validation="<?php echo FreshRSS_Context::$system_conf->limits['max_feeds']; ?>"/>
+			    <input type="number" id="max-feeds" name="max-feeds" value="<?= FreshRSS_Context::$system_conf->limits['max_feeds'] ?>" min="1" data-leave-validation="<?= FreshRSS_Context::$system_conf->limits['max_feeds'] ?>"/>
 			</div>
 		</div>
 
 		<div class="form-group">
-			<label class="group-name" for="max-categories"><?php echo _t('admin.system.max-categories'); ?></label>
+			<label class="group-name" for="max-categories"><?= _t('admin.system.max-categories') ?></label>
 			<div class="group-controls">
-			    <input type="number" id="max-categories" name="max-categories" value="<?php echo FreshRSS_Context::$system_conf->limits['max_categories']; ?>" min="1" data-leave-validation="<?php echo FreshRSS_Context::$system_conf->limits['max_categories']; ?>"/>
+			    <input type="number" id="max-categories" name="max-categories" value="<?= FreshRSS_Context::$system_conf->limits['max_categories'] ?>" min="1" data-leave-validation="<?= FreshRSS_Context::$system_conf->limits['max_categories'] ?>"/>
 			</div>
 		</div>
 
 		<div class="form-group">
-			<label class="group-name" for="cookie-duration"><?php echo _t('admin.system.cookie-duration.number'); ?></label>
+			<label class="group-name" for="cookie-duration"><?= _t('admin.system.cookie-duration.number') ?></label>
 			<div class="group-controls">
-				<input type="number" id="cookie-duration" name="cookie-duration" value="<?php echo FreshRSS_Context::$system_conf->limits['cookie_duration']; ?>" min="0" data-leave-validation="<?php echo FreshRSS_Context::$system_conf->limits['cookie_duration']; ?>"/>
-				<?php echo _i('help'); ?> <?php echo _t('admin.system.cookie-duration.help'); ?>
+				<input type="number" id="cookie-duration" name="cookie-duration" value="<?= FreshRSS_Context::$system_conf->limits['cookie_duration'] ?>" min="0" data-leave-validation="<?= FreshRSS_Context::$system_conf->limits['cookie_duration'] ?>"/>
+				<?= _i('help') ?> <?= _t('admin.system.cookie-duration.help') ?>
 			</div>
 		</div>
 
 		<div class="form-group form-actions">
 			<div class="group-controls">
-				<button type="submit" class="btn btn-important"><?php echo _t('gen.action.submit'); ?></button>
-				<button type="reset" class="btn"><?php echo _t('gen.action.cancel'); ?></button>
+				<button type="submit" class="btn btn-important"><?= _t('gen.action.submit') ?></button>
+				<button type="reset" class="btn"><?= _t('gen.action.cancel') ?></button>
 			</div>
 		</div>
 	</form>