fixed typos in standart token doc

contracts/token/StandardToken.sol

@@ -21,7 +21,7 @@ contract StandardToken is ERC20, BasicToken {
    * @dev Transfer tokens from one address to another
    * @param _from address The address which you want to send tokens from
    * @param _to address The address which you want to transfer to
-   * @param _value uint256 the amout of tokens to be transfered
+   * @param _value uint256 the amount of tokens to be transferred
    */
   function transferFrom(address _from, address _to, uint256 _value) returns (bool) {
     var _allowance = allowed[_from][msg.sender];
@@ -37,7 +37,7 @@ contract StandardToken is ERC20, BasicToken {
   }
 
   /**
-   * @dev Aprove the passed address to spend the specified amount of tokens on behalf of msg.sender.
+   * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
    * @param _spender The address which will spend the funds.
    * @param _value The amount of tokens to be spent.
    */
@@ -58,7 +58,7 @@ contract StandardToken is ERC20, BasicToken {
    * @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 available for the spender.
+   * @return A uint256 specifying the amount of tokens still available for the spender.
    */
   function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
     return allowed[_owner][_spender];