t / t4034 / fortran / poston commit tree-diff: convert diff_root_tree_sha1() to just call diff_tree_sha1 with old=NULL (0b707c3)
   1print *, "Hello World?"
   2
   3DO10I = 1,10
   4DO 10 I = 1,10
   5DO 1 0 I = 1,10