fix typos to run pre-commit checks

ethexe/observer/src/observer.rs

@@ -198,7 +198,7 @@ impl Observer {
 
     /// Clones the `Observer` with resubscribing to blocks.
     ///
-    /// Resubscription here is the same as calling provider's `subscibe_blocks`
+    /// Resubscription here is the same as calling provider's `subscribe_blocks`
     /// method from the sense of both approaches will result in receiving only new blocks.
     /// All the previous blocks queued in the inner channel of the subscription won't be
     /// accessible by the new subscription.

ethexe/processor/src/host/mod.rs

@@ -141,7 +141,7 @@ impl InstanceWrapper {
             maybe_instrumented_code,
         );
 
-        // Peaces of resulting journal. Hack to avoid single allocation limit.
+        // Pieces of resulting journal. Hack to avoid single allocation limit.
         let ptr_lens: Vec<i64> = self.call("run", arg.encode())?;
 
         let mut journal = Vec::new();