anchor.diff:  ! Define universal constants:
   ! In the case of exactly representable numbers, the definitions are useful 
   ! to ensure subprogram argument type/kind/rank matching without having to
  -! repind kind specifiers everywhere.
  +! repeat kind specifiers everywhere.
   module constants_module
     use iso_fortran_env, only : int64
     implicit none
  
positive.code: !     * Redistributions in binary form must reproduce the above copyright
  !       notice, this list of conditions and the following disclaimer in the
  !       documentation and/or other materials provided with the distribution.
  !     * Neither the name of the Sourcery, Inc., nor the
  !       names of its contributors may be used to endorse or promote products
  !       derived from this software without specific prior written permission.
  ! 
  
negative.code: ! Initialize the random seed with a varying seed to ensure a different
  ! random number sequence for each invocation of subroutine, e.g. for 
  ! invocations on different images of a coarray parallel program.
  ! Setting any seed values to zero is deprecated because it can result
  ! in low-quality random number sequences.
  ! (Source: https://gcc.gnu.org/onlinedocs/gfortran/RANDOM_005fSEED.html)
  module random_module
  