Update Code/database.md

Code/database.md

@@ -2,7 +2,7 @@
 
 ### Notes
 - The coordinates at the last step of one stage match the first step coordinates of the next stage
-- In some cases, the Hartree Fork results were copied to the raw DFT 1st file and in this case DFT 1st key is None
+- In some cases, the Hartree Fork results were copied to the raw DFT first substage files and in this case the value of `DFT_1st` is None
 
 ### Key-Value Structure
 - **Keys**:  
@@ -34,7 +34,7 @@
         'gradient': {'atom': f'{element_letter}', 'charge': float(charge_val), 'dx': float(dx_val), 'dy': float(dy_val), 'dz': float(dz_val)}, ...
     }
     ```
-    Note: DFT 1st stage for each molecule is calculated with either FireFly or SMASH. For SMASH method, it does not contain a charge value associated with each atom.
+    Note: `DFT_1st` stage for each molecule is calculated with either FireFly or SMASH. For SMASH method, it does not contain a charge value associated with each atom.
 
 
 ### Accessing LMDB Example