sadjustl Function

   elemental function sadjustl(self) result(adjusted)
   !< Left adjust a string by removing leading spaces.
   !<
   !<```fortran
   !< type(string) :: astring
   !< astring = '   Hello World!'
   !< print "(L1)", astring%adjustl()//''=='Hello World!   '
   !<```
   !=> T <<<
   class(string), intent(in) :: self     !< The string.
   type(string)              :: adjusted !< Adjusted string.

   adjusted = self
   if (allocated(adjusted%raw)) adjusted%raw = adjustl(adjusted%raw)
   endfunction sadjustl