refactor mongets - spaces, tabs, 1 intruction ifs
additional detail related to eroded items

previous commit in this area: c771fadad677e8baaf34478f3961aae888a33685
make heavily eroded items less likely than eroded items

previous related commit: fbfa0e6128ac7bc1f02b212b4862e48da969359c
Make message on gaining shock resistance less cryptid (from dNetHack)