Change natspec delimiters for consistency

contracts/token/ERC721/ERC721.sol

@@ -2,23 +2,29 @@ pragma solidity ^0.4.18;
 
 import "./ERC721Basic.sol";
 
-/// @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
-/// @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
+/**
+ * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
+ * @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
+ */
 contract ERC721Enumerable is ERC721Basic {
   function totalSupply() public view returns (uint256);
   function tokenOfOwnerByIndex(address _owner, uint256 _index) public view returns (uint256 _tokenId);
   function tokenByIndex(uint256 _index) public view returns (uint256);
 }
 
-/// @title ERC-721 Non-Fungible Token Standard, optional metadata extension
-/// @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
+/**
+ * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
+ * @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
+ */
 contract ERC721Metadata is ERC721Basic {
   function name() public view returns (string _name);
   function symbol() public view returns (string _symbol);
   function tokenURI(uint256 _tokenId) public view returns (string);
 }
 
-/// @title ERC-721 Non-Fungible Token Standard, full implementation interface
-/// @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
+/**
+ * @title ERC-721 Non-Fungible Token Standard, full implementation interface
+ * @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
+ */
 contract ERC721 is ERC721Basic, ERC721Enumerable, ERC721Metadata {
 }

contracts/token/ERC721/ERC721Receiver.sol

@@ -1,19 +1,28 @@
 pragma solidity ^0.4.18;
 
+/**
+ * @title ERC721 token receiver interface
+ * @dev Interface for any contract that wants to support safeTransfers
+ *  from ERC721 asset contracts.
+ */
 contract ERC721Receiver {
-  /// @dev Magic value to be returned upon successful reception of an NFT
-  ///  Equals to bytes4(keccak256("onERC721Received(address,uint256,bytes)"))
+  /**
+   * @dev Magic value to be returned upon successful reception of an NFT
+   *  Equals to bytes4(keccak256("onERC721Received(address,uint256,bytes)"))
+   */
   bytes4 ERC721_RECEIVED = 0xf0b9e5ba; 
 
-  /// @notice Handle the receipt of an NFT
-  /// @dev The ERC721 smart contract calls this function on the recipient
-  ///  after a `safetransfer`. This function MAY throw to revert and reject the
-  ///  transfer. This function MUST use 50,000 gas or less. Return of other
-  ///  than the magic value MUST result in the transaction being reverted.
-  ///  Note: the contract address is always the message sender.
-  /// @param _from The sending address 
-  /// @param _tokenId The NFT identifier which is being transfered
-  /// @param _data Additional data with no specified format
-  /// @return `bytes4(keccak256("onERC721Received(address,uint256,bytes)"))`
+  /**
+   * @notice Handle the receipt of an NFT
+   * @dev The ERC721 smart contract calls this function on the recipient
+   *  after a `safetransfer`. This function MAY throw to revert and reject the
+   *  transfer. This function MUST use 50,000 gas or less. Return of other
+   *  than the magic value MUST result in the transaction being reverted.
+   *  Note: the contract address is always the message sender.
+   * @param _from The sending address 
+   * @param _tokenId The NFT identifier which is being transfered
+   * @param _data Additional data with no specified format
+   * @return `bytes4(keccak256("onERC721Received(address,uint256,bytes)"))`
+   */
   function onERC721Received(address _from, uint256 _tokenId, bytes _data) public returns(bytes4);
 }