Fix leading space when fetch_headers is empty (#16)

Author: GermanCoding

test/TlsIconTest.php

@@ -41,10 +41,10 @@ public function testStorage_Init()
 	{
 		$o = new tls_icon();
 		$this->assertSame([
-			'fetch_headers' => ' RECEIVED'
+			'fetch_headers' => 'RECEIVED'
 		], $o->storage_init([]));
 		$this->assertSame([
-			'fetch_headers' => ' RECEIVED'
+			'fetch_headers' => 'RECEIVED'
 		], $o->storage_init(['fetch_headers' => null]));
 		$this->assertSame([
 			'fetch_headers' => 'foo bar RECEIVED'

tls_icon.php

@@ -42,7 +42,7 @@ function get_received_header_content($Received_Header)
 	public function storage_init($p)
 	{
 		$headers = isset($p['fetch_headers']) ? $p['fetch_headers'] : '';
-		$p['fetch_headers'] = trim($headers) . ' ' . strtoupper('Received');
+		$p['fetch_headers'] = trim(trim($headers) . ' ' . strtoupper('Received'));
 		return $p;
 	}