Fix hostname returned when multiple host aliases are defined (#250)

For example, given config:

Host foo bar baz
  HostName 127.0.0.1

The hostname returned will return 'foo' instead of 'foo bar baz'
(invalid).

Fixes #230

Author: h3xx

src/SSHConfigFile.php

@@ -120,7 +120,7 @@ public function findConfiguredHost($host)
                     }
                 }
 
-                return $group['host'];
+                return preg_replace('/\s+.*$/', '', $group['host']);
             }
         }
     }

tests/SSHConfigFileTest.php

@@ -247,6 +247,20 @@ public function test_it_returns_null_for_a_matching_host_if_user_specified_and_i
         $this->assertNull($host);
     }
 
+    public function test_it_returns_valid_host_for_multiple_aliased_hosts()
+    {
+        $config = <<<'EOT'
+Host foo bar baz
+Hostname baz.com
+User john
+EOT;
+        $sshConfig = SSHConfigFile::parseString($config);
+        $host = $sshConfig->findConfiguredHost('baz.com');
+
+        // Really, any one of the host's aliases would work
+        $this->assertContains($host, ['foo', 'bar', 'baz']);
+    }
+
     private function parse($config)
     {
         $sshConfig = SSHConfigFile::parseString($config);