typo (#181)

Author: loshtbh

src/Vm.sol

@@ -189,7 +189,7 @@ interface Vm {
     // This is similar to `roll` but for the currently active fork
     function rollFork(uint256) external;
     // Updates the currently active fork to given transaction
-    // this will `rollFork` with the number of the block the transaction was mined it and replays all transaction mined before it in the block
+    // this will `rollFork` with the number of the block the transaction was mined in and replays all transaction mined before it in the block
     function rollFork(bytes32) external;
     // Updates the given fork to given block number
     function rollFork(uint256 forkId, uint256 blockNumber) external;