Commit JT 092319

- modified norm input in min_modify
- corrected doc/src/min_modify.txt
- added expression of the norms
- added a min max method in src/min.h

src/min_hftn.cpp

@@ -113,7 +113,7 @@ void MinHFTN::init()
 {
   Min::init();
 
-  if (normstyle == 1)
+  if (normstyle == MAX)
     error->all(FLERR,"Incorrect min_modify option");
 
   for (int  i = 1; i < NUM_HFTN_ATOM_BASED_VECTORS; i++) {