convert 2 spaces to 4 spaces

contracts/token/ERC20/TokenTimelock.sol

@@ -10,65 +10,65 @@ import "./SafeERC20.sol";
  * beneficiary to extract the tokens after a given release time
  */
 contract TokenTimelock is Initializable {
-  using SafeERC20 for IERC20;
+    using SafeERC20 for IERC20;
 
-  // ERC20 basic token contract being held
-  IERC20 private _token;
+    // ERC20 basic token contract being held
+    IERC20 private _token;
 
-  // beneficiary of tokens after they are released
-  address private _beneficiary;
+    // beneficiary of tokens after they are released
+    address private _beneficiary;
 
-  // timestamp when token release is enabled
-  uint256 private _releaseTime;
+    // timestamp when token release is enabled
+    uint256 private _releaseTime;
 
-  function initialize(
-    IERC20 token,
-    address beneficiary,
-    uint256 releaseTime
-  )
-    public
-    initializer
-  {
-    // solium-disable-next-line security/no-block-members
-    require(releaseTime > block.timestamp);
-    _token = token;
-    _beneficiary = beneficiary;
-    _releaseTime = releaseTime;
-  }
+    function initialize(
+        IERC20 token,
+        address beneficiary,
+        uint256 releaseTime
+    )
+        public
+        initializer
+    {
+        // solium-disable-next-line security/no-block-members
+        require(releaseTime > block.timestamp);
+        _token = token;
+        _beneficiary = beneficiary;
+        _releaseTime = releaseTime;
+    }
 
-  /**
-   * @return the token being held.
-   */
-  function token() public view returns(IERC20) {
-    return _token;
-  }
+    /**
+     * @return the token being held.
+     */
+    function token() public view returns(IERC20) {
+        return _token;
+    }
 
-  /**
-   * @return the beneficiary of the tokens.
-   */
-  function beneficiary() public view returns(address) {
-    return _beneficiary;
-  }
+    /**
+     * @return the beneficiary of the tokens.
+     */
+    function beneficiary() public view returns(address) {
+        return _beneficiary;
+    }
 
-  /**
-   * @return the time when the tokens are released.
-   */
-  function releaseTime() public view returns(uint256) {
-    return _releaseTime;
-  }
+    /**
+     * @return the time when the tokens are released.
+     */
+    function releaseTime() public view returns(uint256) {
+        return _releaseTime;
+    }
 
-  /**
-   * @notice Transfers tokens held by timelock to beneficiary.
-   */
-  function release() public {
-    // solium-disable-next-line security/no-block-members
-    require(block.timestamp >= _releaseTime);
+    /**
+     * @notice Transfers tokens held by timelock to beneficiary.
+     */
+    function release() public {
+        // solium-disable-next-line security/no-block-members
+        require(block.timestamp >= _releaseTime);
 
-    uint256 amount = _token.balanceOf(address(this));
-    require(amount > 0);
+        uint256 amount = _token.balanceOf(address(this));
+        require(amount > 0);
 
-    _token.safeTransfer(_beneficiary, amount);
-  }
+        _token.safeTransfer(_beneficiary, amount);
+    }
 
-  uint256[50] private ______gap;
+    uint256[50] private ______gap;
 }