Updating Information on Gas Refunds (#128)

* Update full-tutorial.md

Remove note about cost refunds.

* Update full-tutorial.md

---------

Co-authored-by: Iulia Popescu <ipopescu@users.noreply.github.com>

docs/full-tutorial.md

@@ -245,7 +245,7 @@ Now you can install the contract to the network and check how it behaves.
 
 If you are sending the deploy on Mainnet, try several put deploys on the Testnet to understand the exact gas amount required for that deploy. Refer to the [note about gas price](https://docs.casper.network/developers/dapps/sending-deploys/#a-note-about-gas-price) to understand more about payment amounts and gas price adjustments.
 
-**The Casper platform currently does not refund any tokens as part of sending a deploy.** For example, if you spend 10 CSPR for the deployment and it only costs 1 CSPR, you will not receive the remaining 9 CSPR. Refer to the [Gas and the Casper Blockchain](https://docs.casper.network/concepts/economics/gas-concepts/) documentation for further details.
+Casper's Peregrine update introduced a refund system. In the event of overpay, 99% of unspent funds will be refunded. The refund only takes into account overpay after the actual gas cost of the Deploy in question.
 
 Use the following command template to deploy the contract:
 
@@ -809,4 +809,4 @@ You can see that the name is `CasperTest` in this example.
  }
 }
 
-```
+```