fix misplaced doc comment

Author: rustopian

rent/src/lib.rs

@@ -81,10 +81,6 @@ impl Default for Rent {
 }
 
 impl Rent {
-    /// Calculate how much rent to burn from the collected rent.
-    ///
-    /// The first value returned is the amount burned. The second is the amount
-    /// to distribute to validators.
     pub fn lamports_per_byte_year(&self) -> u64 {
         u64::from_le_bytes(self.lamports_per_byte_year)
     }
@@ -105,6 +101,10 @@ impl Rent {
         }
     }
 
+    /// Calculate how much rent to burn from the collected rent.
+    ///
+    /// The first value returned is the amount burned. The second is the amount
+    /// to distribute to validators.
     pub fn calculate_burn(&self, rent_collected: u64) -> (u64, u64) {
         let burned_portion = (rent_collected * u64::from(self.burn_percent)) / 100;
         (burned_portion, rent_collected - burned_portion)