Documentation.

docs/common-patterns.rst

@@ -28,7 +28,7 @@ you receive the funds of the person who is now the richest.
 ::
 
     // SPDX-License-Identifier: GPL-3.0
-    pragma solidity >=0.5.0 <0.8.0;
+    pragma solidity >0.6.99 <0.8.0;
 
     contract WithdrawalContract {
         address public richest;
@@ -36,7 +36,7 @@ you receive the funds of the person who is now the richest.
 
         mapping (address => uint) pendingWithdrawals;
 
-        constructor() public payable {
+        constructor() payable {
             richest = msg.sender;
             mostSent = msg.value;
         }
@@ -62,13 +62,13 @@ This is as opposed to the more intuitive sending pattern:
 ::
 
     // SPDX-License-Identifier: GPL-3.0
-    pragma solidity >=0.5.0 <0.8.0;
+    pragma solidity >0.6.99 <0.8.0;
 
     contract SendContract {
         address payable public richest;
         uint public mostSent;
 
-        constructor() public payable {
+        constructor() payable {
             richest = msg.sender;
             mostSent = msg.value;
         }