docs: fix spelling issues

lesson3_violations/Borda/Borda.sol

@@ -9,7 +9,7 @@ contract Borda is IBorda{
     // A map storing whether an address has already voted. Initialized to false.
     mapping (address => bool)  _voted;
 
-    // Points each candidate has recieved, initialized to zero.
+    // Points each candidate has received, initialized to zero.
     mapping (address => uint256) _points;
 
     // current maximum points of all candidates.
@@ -45,4 +45,4 @@ contract Borda is IBorda{
     function voted(address x) public view override returns(bool) {
         return _voted[x];
     }
-}
+}

lesson3_violations/Borda/BordaBug1.sol

@@ -9,7 +9,7 @@ contract Borda is IBorda{
     // A map storing whether an address has already voted. Initialized to false.
     mapping (address => bool)  _voted;
 
-    // Points each candidate has recieved, initialized to zero.
+    // Points each candidate has received, initialized to zero.
     mapping (address => uint256) _points;
 
     // current max points of all candidates.
@@ -45,4 +45,4 @@ contract Borda is IBorda{
     function voted(address x) public view override returns(bool) {
         return _voted[x];
     }
-}
+}

lesson3_violations/Borda/BordaBug2.sol

@@ -9,7 +9,7 @@ contract Borda is IBorda{
     // A map storing whether an address has already voted. Initialized to false.
     mapping (address => bool)  _voted;
 
-    // Points each candidate has recieved, initialized to zero.
+    // Points each candidate has received, initialized to zero.
     mapping (address => uint256) _points;
 
     // current max points of all candidates.
@@ -53,4 +53,4 @@ contract Borda is IBorda{
     function voted(address x) public view override returns(bool) {
         return _voted[x];
     }
-}
+}

lesson3_violations/Borda/BordaBug3.sol

@@ -9,7 +9,7 @@ contract Borda is IBorda{
     // A map storing whether an address has already voted. Initialized to false.
     mapping (address => bool)  _voted;
 
-    // Points each candidate has recieved, initialized to zero.
+    // Points each candidate has received, initialized to zero.
     mapping (address => uint256) _points;
 
     address private _blacklisted  ;
@@ -51,4 +51,4 @@ contract Borda is IBorda{
     function voted(address x) public view override returns(bool) {
         return _voted[x];
     }
-}
+}

lesson3_violations/Borda/BordaBug4.sol

@@ -9,7 +9,7 @@ contract Borda is IBorda{
     // A map storing whether an address has already voted. Initialized to false.
     mapping (address => bool)  _voted;
 
-    // Points each candidate has recieved, initialized to zero.
+    // Points each candidate has received, initialized to zero.
     mapping (address => uint256) _points;
 
     // current max points of all candidates.
@@ -52,4 +52,4 @@ contract Borda is IBorda{
          _winner = msg.sender; 
     }
 
-}
+}

lesson3_violations/Borda/IBorda.sol

@@ -6,7 +6,7 @@ pragma solidity ^0.8.0;
  * 
  * The election system follows the following rules:
  *
- * - Every user with an Etheruem address is allowed to vote in the election.
+ * - Every user with an Ethereum address is allowed to vote in the election.
  * - A voter may vote to 3 distinct contenders at once. 
  * - The voter's 1st choice gets 3 points, their 2nd choice gets 2 points, and their 3rd
  *   choice gets 1 point.
@@ -27,4 +27,4 @@ interface IBorda {
 
     // has user x voted?
     function voted(address x) external view returns(bool);
-}
+}

lesson3_violations/Borda/bounty_specs/BordaNewBug2.sol

@@ -16,7 +16,7 @@ contract Borda is IBorda {
     // A map storing whether an address has already voted. Initialized to false.
     mapping (address => bool)  _voted;
 
-    // Points each candidate has recieved, initialized to zero.
+    // Points each candidate has received, initialized to zero.
     mapping (address => uint256) _points;
 
     // current maximum points of all candidates.
@@ -52,4 +52,4 @@ contract Borda is IBorda {
     function voted(address x) public view override returns(bool) {
         return _voted[x];
     }
-}
+}

lesson3_violations/Borda/bounty_specs/BordaNewBug3.sol

@@ -16,7 +16,7 @@ contract Borda is IBorda{
     // A map storing whether an address has already voted. Initialized to false.
     mapping (address => bool)  _voted;
 
-    // Points each candidate has recieved, initialized to zero.
+    // Points each candidate has received, initialized to zero.
     mapping (address => uint256) _points;
 
     // current maximum points of all candidates.
@@ -52,4 +52,4 @@ contract Borda is IBorda{
     function voted(address x) public view override returns(bool) {
         return _voted[x];
     }
-}
+}

lesson3_violations/Borda/bounty_specs/BordaNewBug4.sol

@@ -16,7 +16,7 @@ contract Borda is IBorda{
     // A map storing whether an address has already voted. Initialized to false.
     mapping (address => bool)  _voted;
 
-    // Points each candidate has recieved, initialized to zero.
+    // Points each candidate has received, initialized to zero.
     mapping (address => uint256) _points;
 
     // current maximum points of all candidates.

lesson3_violations/Borda/bounty_specs/BordaNewBug5.sol

@@ -16,7 +16,7 @@ contract Borda is IBorda{
     // A map storing whether an address has already voted. Initialized to false.
     mapping (address => bool)  _voted;
 
-    // Points each candidate has recieved, initialized to zero.
+    // Points each candidate has received, initialized to zero.
     mapping (address => uint256) _points;
 
     // current maximum points of all candidates.