underscore Subroutine

  subroutine underscore(string)

    !! Routine that converts spaces in a string to underscores
    !! author: P J Knight, CCFE, Culham Science Centre
    !! string : input/output string : character string of interest
    !! This routine converts any space characters in the string
    !! to underscore characters.
    !! None
    !
    ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

		use numerics, only: active_constraints, boundu, boundl
		use constants, only: electron_charge
    implicit none

    !  Arguments

    character(len=*), intent(inout) :: string

    !  Local variables

    integer :: loop, i

    ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    i = index(string, ' ')
    if (i > 0) then
       do loop = i, len(string)
          if (string(loop:loop) == ' ') string(loop:loop) = '_'
       end do
    end if

  end subroutine underscore