Fixed linting

Author: nkuba

solidity/contracts/AbstractBonding.sol

@@ -20,6 +20,7 @@ import "@keep-network/keep-core/contracts/StakeDelegatable.sol";
 import "@keep-network/sortition-pools/contracts/api/IBonding.sol";
 import "openzeppelin-solidity/contracts/math/SafeMath.sol";
 
+
 /// @title Keep Bonding
 /// @notice Contract holding deposits from keeps' operators.
 contract AbstractBonding is IBonding {
@@ -189,11 +190,11 @@ contract AbstractBonding is IBonding {
     /// @param holder Address of the holder of the bond.
     /// @param referenceID Reference ID of the bond.
     /// @return Amount of wei in the selected bond.
-    function bondAmount(
-        address operator,
-        address holder,
-        uint256 referenceID
-    ) public view returns (uint256) {
+    function bondAmount(address operator, address holder, uint256 referenceID)
+        public
+        view
+        returns (uint256)
+    {
         bytes32 bondID = keccak256(
             abi.encodePacked(operator, holder, referenceID)
         );

solidity/contracts/ETHStaking.sol

@@ -20,6 +20,7 @@ import "@keep-network/keep-core/contracts/KeepRegistry.sol";
 
 import "openzeppelin-solidity/contracts/math/SafeMath.sol";
 
+
 /// @title ETH Staking
 /// @notice A staking contract for ETH staking. An owner of the ETH can delegate
 /// ETH as a stake to an operator. The value of ETH the owner is willing to stake

solidity/contracts/KeepBonding.sol

@@ -19,6 +19,7 @@ import "./AbstractBonding.sol";
 import "@keep-network/keep-core/contracts/TokenGrant.sol";
 import "@keep-network/keep-core/contracts/libraries/RolesLookup.sol";
 
+
 /// @title Keep Bonding
 /// @notice Contract holding deposits from keeps' operators.
 contract KeepBonding is AbstractBonding {