Issue #1900356 by swentel: Fixed Redundant space in theme_field() function.

core/modules/field/field.module

@@ -1268,7 +1268,7 @@ function theme_field($variables) {
   $output .= '</div>';
 
   // Render the top-level DIV.
-  $output = '<div ' . $variables['attributes'] . '>' . $output . '</div>';
+  $output = '<div' . $variables['attributes'] . '>' . $output . '</div>';
 
   return $output;
 }