change BFGS name and make lattice_change_cg and ions_move_cg shorter

Author: Fei Yang

source/source_io/read_input_item_relax.cpp

@@ -14,12 +14,12 @@ void ReadInput::item_relax()
         item.annotation = "cg [param]; bfgs [param]; ...";
         read_sync_string(input.relax_method);
         item.read_value = [](const Input_Item& item, Parameter& para) {
-    std::istringstream iss(para.input.relax_method);
-    iss >> para.input.relax_method_param.method;
-    if (!(iss >> para.input.relax_method_param.param)) {
+        std::istringstream iss(para.input.relax_method);
+        iss >> para.input.relax_method_param.method;
+        if (!(iss >> para.input.relax_method_param.param)) {
         para.input.relax_method_param.param = 1;
-    }
-};
+        }
+        };
         item.check_value = [](const Input_Item& item, const Parameter& para) {
         const std::vector<std::string> relax_methods = {"cg", "sd","bfgs_old" "cg_bfgs","bfgs","lbfgs"};
         if (std::find(relax_methods.begin(), relax_methods.end(), para.input.relax_method_param.method) == relax_methods.end()) {