Remove space

src/wp-includes/class-wp-xmlrpc-server.php

@@ -272,7 +272,7 @@ public function sayHello() {
 	 */
 	public function addTwoNumbers( $args ) {
 		if ( ! is_int( $args[0] ) || ! is_int( $args[1] ) ) {
-			$this->error = new IXR_Error( 400, __( 'Invalid arguments passed to this XML-RPC method.  Requires two integers.' ) );
+			$this->error = new IXR_Error( 400, __( 'Invalid arguments passed to this XML-RPC method. Requires two integers.' ) );
 			return $this->error;
 		}
 

tests/phpunit/tests/xmlrpc/demo/addTwoNumbers.php

@@ -57,7 +57,7 @@ public function test_add_two_numbers_with_invalid_arguments( $a, $b, $message )
 		$this->assertIXRError( $result, $message );
 		$this->assertSame( 400, $result->code, $message );
 		$this->assertSame(
-			'Invalid arguments passed to this XML-RPC method.  Requires two integers.',
+			'Invalid arguments passed to this XML-RPC method. Requires two integers.',
 			$result->message,
 			$message
 		);