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, 14 insertions, 14 deletions

diff --git a/app/views/auth/register.phtml b/app/views/auth/register.phtml
index b90950510..4233f7fd4 100644
--- a/app/views/auth/register.phtml
+++ b/app/views/auth/register.phtml
@@ -1,36 +1,36 @@
 <div class="prompt">
-	<h1><?php echo _t('gen.auth.registration'); ?></h1>
+	<h1><?= _t('gen.auth.registration') ?></h1>
 
-	<form method="post" action="<?php echo _url('user', 'create'); ?>">
-		<input type="hidden" name="_csrf" value="<?php echo FreshRSS_Auth::csrfToken(); ?>" />
+	<form method="post" action="<?= _url('user', 'create') ?>">
+		<input type="hidden" name="_csrf" value="<?= FreshRSS_Auth::csrfToken() ?>" />
 		<div>
-			<label class="group-name" for="new_user_name"><?php echo _t('gen.auth.username'), '<br />', _i('help'), ' ', _t('gen.auth.username.format'); ?></label>
-			<input id="new_user_name" name="new_user_name" type="text" size="16" required="required" autocomplete="off" pattern="<?php echo FreshRSS_user_Controller::USERNAME_PATTERN; ?>" />
+			<label class="group-name" for="new_user_name"><?= _t('gen.auth.username'), '<br />', _i('help'), ' ', _t('gen.auth.username.format') ?></label>
+			<input id="new_user_name" name="new_user_name" type="text" size="16" required="required" autocomplete="off" pattern="<?= FreshRSS_user_Controller::USERNAME_PATTERN ?>" />
 		</div>
 
 		<?php if ($this->show_email_field) { ?>
 			<div>
 				<label class="group-name" for="new_user_email">
-					<?php echo _t('gen.auth.email'); ?>
+					<?= _t('gen.auth.email') ?>
 				</label>
 				<input id="new_user_email" name="new_user_email" type="email" required />
 			</div>
 		<?php } ?>
 
 		<div>
-			<label class="group-name" for="new_user_passwordPlain"><?php echo _t('gen.auth.password'), '<br />', _i('help'), ' ', _t('gen.auth.password.format'); ?></label>
+			<label class="group-name" for="new_user_passwordPlain"><?= _t('gen.auth.password'), '<br />', _i('help'), ' ', _t('gen.auth.password.format') ?></label>
 			<div class="stick">
 				<input type="password" id="new_user_passwordPlain" name="new_user_passwordPlain" required="required" autocomplete="new-password" pattern=".{7,}" />
-				<a class="btn toggle-password" data-toggle="new_user_passwordPlain"><?php echo _i('key'); ?></a>
+				<a class="btn toggle-password" data-toggle="new_user_passwordPlain"><?= _i('key') ?></a>
 			</div>
-			<noscript><b><?php echo _t('gen.js.should_be_activated'); ?></b></noscript>
+			<noscript><b><?= _t('gen.js.should_be_activated') ?></b></noscript>
 		</div>
 
 		<?php if ($this->show_tos_checkbox) { ?>
 			<div>
 				<label class="checkbox" for="accept-tos">
 					<input type="checkbox" name="accept_tos" id="accept-tos" value="1" required />
-					<?php echo _t('gen.auth.accept_tos', _url('index', 'tos')); ?>
+					<?= _t('gen.auth.accept_tos', _url('index', 'tos')) ?>
 				</label>
 			</div>
 		<?php } ?>
@@ -42,11 +42,11 @@
 					'php', true
 				));
 			?>
-			<input type="hidden" name="r" value="<?php echo $redirect_url; ?>" />
-			<button type="submit" class="btn btn-important"><?php echo _t('gen.action.create'); ?></button>
-			<a class="btn" href="<?php echo _url('index', 'index'); ?>"><?php echo _t('gen.action.cancel'); ?></a>
+			<input type="hidden" name="r" value="<?= $redirect_url ?>" />
+			<button type="submit" class="btn btn-important"><?= _t('gen.action.create') ?></button>
+			<a class="btn" href="<?= _url('index', 'index') ?>"><?= _t('gen.action.cancel') ?></a>
 		</div>
 	</form>
 
-	<p><a href="<?php echo _url('index', 'about'); ?>"><?php echo _t('gen.freshrss.about'); ?></a></p>
+	<p><a href="<?= _url('index', 'about') ?>"><?= _t('gen.freshrss.about') ?></a></p>
 </div>