chore: fix some typos (#1997)

* Update events.rs

* Update transaction_extensions.rs

* Update mod.rs

* Update lib.rs

---------

Co-authored-by: James Wilson <james@jsdw.me>

core/src/config/transaction_extensions.rs

@@ -77,7 +77,7 @@ impl<T: Config> ExtrinsicParamsEncoder for VerifySignature<T> {
         // Downcast refs back to concrete types (we use `&dyn Any`` so that the trait remains object safe)
         let account = account
             .downcast_ref::<T::AccountId>()
-            .expect("A T::AccoundId should have been provided")
+            .expect("A T::AccountId should have been provided")
             .clone();
         let signature = signature
             .downcast_ref::<T::Signature>()

core/src/events.rs

@@ -722,7 +722,7 @@ mod tests {
         let metadata = metadata::<Event>();
 
         // Encode our events in the format we expect back from a node, and
-        // construst an Events object to iterate them:
+        // construct an Events object to iterate them:
         let event1 = Event::A(1);
         let event2 = Event::B(true);
         let event3 = Event::A(234);

testing/integration-tests/src/light_client/mod.rs

@@ -136,7 +136,7 @@ async fn storage_plain_lookup(api: &Client) -> Result<(), subxt::Error> {
     Ok(())
 }
 
-// Make a dynamic constant query for `System::BlockLenght`.
+// Make a dynamic constant query for `System::BlockLength`.
 async fn dynamic_constant_query(api: &Client) -> Result<(), subxt::Error> {
     let now = std::time::Instant::now();
     tracing::trace!("Check dynamic_constant_query");

utils/strip-metadata/src/lib.rs

@@ -442,7 +442,7 @@ mod test {
     use codec::Compact;
     use scale_info::meta_type;
 
-    /// Create dummy types that we can check the presense of with is_in_types.
+    /// Create dummy types that we can check the presence of with is_in_types.
     macro_rules! make_types {
         ($($name:ident)+) => {
             $(