tweak box output format to include decimal point

src/domain.cpp

@@ -1939,13 +1939,13 @@ void Domain::print_box(const std::string &prefix)
   if (comm->me == 0) {
     std::string mesg = prefix;
     if (triclinic == 0) {
-      mesg += fmt::format("orthogonal box = ({:.8g} {:.8g} {:.8g}) to "
-                          "({:.8g} {:.8g} {:.8g})\n",boxlo[0],boxlo[1],
+      mesg += fmt::format("orthogonal box = ({:.8} {:.8} {:.8}) to "
+                          "({:.8} {:.8} {:.8})\n",boxlo[0],boxlo[1],
                           boxlo[2],boxhi[0],boxhi[1],boxhi[2]);
     } else {
-      mesg += fmt::format("triclinic box = ({:.8g} {:.8g} {:.8g}) to "
-                          "({:.8g} {:.8g} {:.8g}) with tilt "
-                          "({:.8g} {:.8g} {:.8g})\n",boxlo[0],boxlo[1],
+      mesg += fmt::format("triclinic box = ({:.8} {:.8} {:.8}) to "
+                          "({:.8} {:.8} {:.8}) with tilt "
+                          "({:.8} {:.8} {:.8})\n",boxlo[0],boxlo[1],
                           boxlo[2],boxhi[0],boxhi[1],boxhi[2],xy,xz,yz);
     }
     utils::logmesg(lmp,mesg);