Update docs/web3-eth-contract.rst

Co-Authored-By: cgewecke <christophergewecke@gmail.com>

docs/web3-eth-contract.rst

@@ -543,7 +543,7 @@ The **callback** will return the 32 bytes transaction hash.
 - ``"transactionHash"`` returns ``String``: is fired right after the transaction is sent and a transaction hash is available.
 - ``"receipt"`` returns ``Object``: is fired when the transaction *receipt* is available. Receipts from contracts will have no ``logs`` property, but instead an ``events`` property with event names as keys and events as properties. See :ref:`getPastEvents return values <contract-events-return>` for details about the returned event object.
 - ``"confirmation"`` returns ``Number``, ``Object``: is fired for every confirmation up to the 24th confirmation. Receives the confirmation number as the first and the receipt as the second argument. Fired from confirmation 1 on, which is the block where it's minded.
-- ``"error"`` returns ``Error`` and ``Object|undefined``: is fired if an error occurs during sending. If a out of gas error, the second parameter is the receipt.
+``"error"`` returns ``Error`` and ``Object|undefined``: Is fired if an error occurs during sending. If the transaction was rejected by the network with a receipt, the second parameter will be the receipt.
 
 
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