Various spelling fixes

src/bank.rs

@@ -343,7 +343,7 @@ impl Bank {
     /// Execute a transaction.
     /// This method calls the contract's process_transaction method and verifies that the result of
     /// the contract does not violate the bank's accounting rules.
-    /// The accounts are commited back to the bank only if this function returns Ok(_).
+    /// The accounts are committed back to the bank only if this function returns Ok(_).
     fn execute_transaction(tx: Transaction, accounts: &mut [Account]) -> Result<Transaction> {
         let pre_total: i64 = accounts.iter().map(|a| a.tokens).sum();
         let pre_data: Vec<_> = accounts

src/budget_contract.rs

@@ -127,7 +127,7 @@ impl BudgetContract {
                 }
 
                 if accounts[0].tokens < contract.tokens {
-                    trace!("insufficent funds");
+                    trace!("insufficient funds");
                     return Err(BudgetError::InsufficientFunds(tx.keys[0]));
                 } else {
                     accounts[0].tokens -= contract.tokens;
@@ -175,7 +175,7 @@ impl BudgetContract {
                     Err(BudgetError::UninitializedContract(tx.keys[1]))
                 } else {
                     state.apply_timestamp(tx, accounts, *dt)?;
-                    trace!("apply timestamp commited");
+                    trace!("apply timestamp committed");
                     state.serialize(&mut accounts[1].userdata);
                     Ok(())
                 }
@@ -191,7 +191,7 @@ impl BudgetContract {
                 } else {
                     trace!("apply signature");
                     state.apply_signature(tx, *signature, accounts)?;
-                    trace!("apply signature commited");
+                    trace!("apply signature committed");
                     state.serialize(&mut accounts[1].userdata);
                     Ok(())
                 }

src/instruction.rs

@@ -53,7 +53,7 @@ pub struct Vote {
 /// An instruction to progress the smart contract.
 #[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Clone)]
 pub enum Instruction {
-    /// Declare and instanstansiate `Contract`.
+    /// Declare and instantiate `Contract`.
     NewContract(Contract),
 
     /// Tell a payment plan acknowledge the given `DateTime` has past.