CS/consistency fixes

- Added comma into new exception message (grammar)
- Added space around `.` operator in test (CS)

Author: weierophinney

src/Uri.php

@@ -308,7 +308,7 @@ public function withPort($port)
     {
         if (! is_numeric($port) && $port !== null) {
             throw new InvalidArgumentException(sprintf(
-                'Invalid port "%s" specified; must be an integer, an integer string or null',
+                'Invalid port "%s" specified; must be an integer, an integer string, or null',
                 (is_object($port) ? get_class($port) : gettype($port))
             ));
         }

test/UriTest.php

@@ -89,7 +89,7 @@ public function testWithPortReturnsNewInstanceWithProvidedPort($port)
         $this->assertNotSame($uri, $new);
         $this->assertEquals($port, $new->getPort());
         $this->assertEquals(
-            sprintf('https://user:[email protected]%s/foo?bar=baz#quz', $port === null ? '' : ':'.$port),
+            sprintf('https://user:[email protected]%s/foo?bar=baz#quz', $port === null ? '' : ':' . $port),
             (string) $new
         );
     }