Merge pull request #273 from jooray/patch-1

Fix typo in StandardToken allowance documentation

contracts/token/StandardToken.sol

@@ -53,7 +53,7 @@ contract StandardToken is BasicToken, ERC20 {
   }
 
   /**
-   * @dev Function to check the amount of tokens than an owner allowed to a spender.
+   * @dev Function to check the amount of tokens that an owner allowed to a spender.
    * @param _owner address The address which owns the funds.
    * @param _spender address The address which will spend the funds.
    * @return A uint256 specifing the amount of tokens still avaible for the spender.