Bugfix for WRF urban NbS syntax (#2296)

TYPE: bugfix

KEYWORDS: syntax

SOURCE: internal

DESCRIPTION OF CHANGES:
Problem:
PR #2272 adds invalid Fortran syntax

Solution:
Resolve syntax issue

Author: islas

dyn_em/module_first_rk_step_part1.F

@@ -803,7 +803,7 @@ SUBROUTINE first_rk_step_part1 (   grid , config_flags              &
      &        ,FLXHUMR_URB2D=grid%flxhumr_urb2d                           & !H urban
      &        ,FLXHUMB_URB2D=grid%flxhumb_urb2d                           & !H urban
      &        ,FLXHUMG_URB2D=grid%flxhumg_urb2d                           & !H urban
-     &        ! added by Chenghao Wang
+              ! added by Chenghao Wang
      &        ,TVG_URB2D=grid%tvg_urb2d                                   & !H urban
      &        ,XXXVG_URB2D=grid%xxxvg_urb2d                               & !H urban
      &        ,TVGL_URB3D=grid%tvgl_urb3d                                 & !H urban