Modify Rmd files by increasing pound sign counts. This is needed for the RMD files converted from mlx, where I can only set file top hierachy to 2 pounds, but should be three for M4Econ
ff_sup_lower_hierarchy(st_file, it_hierachy_lower_rmd = 1)string texts contents from a R4Econ RMD file.
integer how many pound tiers to promote hierarchy by
modified texts