[Console] Fix null handling in formatAndWrap()

Author: derrabus

Formatter/OutputFormatter.php

@@ -140,6 +140,10 @@ public function format(?string $message)
      */
     public function formatAndWrap(?string $message, int $width)
     {
+        if (null === $message) {
+            return '';
+        }
+
         $offset = 0;
         $output = '';
         $openTagRegex = '[a-z](?:[^\\\\<>]*+ | \\\\.)*';

Tests/Formatter/OutputFormatterTest.php

@@ -343,6 +343,7 @@ public function testFormatAndWrap()
         $this->assertSame("pre\nfoo\nbar\nbaz\npos\nt", $formatter->formatAndWrap('pre <error>foo bar baz</error> post', 3));
         $this->assertSame("pre \nfoo \nbar \nbaz \npost", $formatter->formatAndWrap('pre <error>foo bar baz</error> post', 4));
         $this->assertSame("pre f\noo ba\nr baz\npost", $formatter->formatAndWrap('pre <error>foo bar baz</error> post', 5));
+        $this->assertSame('', $formatter->formatAndWrap(null, 5));
     }
 }