Fix typos and markdown (#2388)

* Fix typos

* Align properly

* Update core/consensus/slots/src/lib.rs

Co-Authored-By: cmichi <mich@elmueller.net>

* Update core/network/src/test/mod.rs

Co-Authored-By: cmichi <mich@elmueller.net>

* Update core/finality-grandpa/src/communication/mod.rs

Co-Authored-By: cmichi <mich@elmueller.net>

* Update core/consensus/common/src/import_queue.rs

Co-Authored-By: cmichi <mich@elmueller.net>

substrate/srml/contract/src/gas.rs

@@ -255,7 +255,7 @@ pub fn refund_unused_gas<T: Trait>(
 	}
 }
 
-/// A little handy utility for converting a value in balance units into approximitate value in gas units
+/// A little handy utility for converting a value in balance units into approximate value in gas units
 /// at the given gas price.
 pub fn approx_gas_for_balance<T: Trait>(gas_price: BalanceOf<T>, balance: BalanceOf<T>) -> T::Gas {
 	let amount_in_gas: BalanceOf<T> = balance / gas_price;
@@ -316,7 +316,7 @@ mod tests {
 	struct DoubleTokenMetadata {
 		multiplier: u64,
 	}
-	/// A simple token that charges for the given amount multipled to
+	/// A simple token that charges for the given amount multiplied to
 	/// a multiplier taken from a given metadata.
 	#[derive(Copy, Clone, PartialEq, Eq, Debug)]
 	struct DoubleToken(u64);
@@ -324,7 +324,7 @@ mod tests {
 	impl Token<Test> for DoubleToken {
 		type Metadata = DoubleTokenMetadata;
 		fn calculate_amount(&self, metadata: &DoubleTokenMetadata) -> u64 {
-			// Probably you want to use saturating mul in producation code.
+			// Probably you want to use saturating mul in production code.
 			self.0 * metadata.multiplier
 		}
 	}

substrate/srml/contract/src/lib.rs

@@ -308,7 +308,7 @@ decl_module! {
 			let result = ctx.call(dest, value, &mut gas_meter, &data, exec::EmptyOutputBuf::new());
 
 			if let Ok(_) = result {
-				// Commit all changes that made it thus far into the persistant storage.
+				// Commit all changes that made it thus far into the persistent storage.
 				DirectAccountDb.commit(ctx.overlay.into_change_set());
 
 				// Then deposit all events produced.
@@ -362,7 +362,7 @@ decl_module! {
 			let result = ctx.instantiate(endowment, &mut gas_meter, &code_hash, &data);
 
 			if let Ok(_) = result {
-				// Commit all changes that made it thus far into the persistant storage.
+				// Commit all changes that made it thus far into the persistent storage.
 				DirectAccountDb.commit(ctx.overlay.into_change_set());
 
 				// Then deposit all events produced.

substrate/srml/contract/src/wasm/env_def/macros.rs

@@ -167,7 +167,7 @@ macro_rules! register_func {
 /// will panic if called with unexpected arguments.
 ///
 /// It's up to the user of this macro to check signatures of wasm code to be executed
-/// and reject the code if any imported function has a mismached signature.
+/// and reject the code if any imported function has a mismatched signature.
 macro_rules! define_env {
 	( $init_name:ident , < E: $ext_ty:tt > ,
 		$( $name:ident ( $ctx:ident $( , $names:ident : $params:ty )* )

substrate/srml/contract/src/wasm/mod.rs

@@ -155,8 +155,8 @@ impl<'a, T: Trait> crate::exec::Vm<T> for WasmVm<'a, T> {
 			Err(err @ sandbox::Error::Execution) => to_execution_result(runtime, Some(err)),
 			Err(_err @ sandbox::Error::Module) => {
 				// `Error::Module` is returned only if instantiation or linking failed (i.e.
-				// wasm bianry tried to import a function that is not provided by the host).
-				// This shouldn't happen because validation proccess ought to reject such binaries.
+				// wasm binary tried to import a function that is not provided by the host).
+				// This shouldn't happen because validation process ought to reject such binaries.
 				//
 				// Because panics are really undesirable in the runtime code, we treat this as
 				// a trap for now. Eventually, we might want to revisit this.

substrate/srml/contract/src/wasm/prepare.rs

@@ -318,7 +318,7 @@ pub fn prepare_contract<T: Trait, C: ImportSatisfyCheck>(
 			(initial, Some(maximum)) => MemoryDefinition { initial, maximum },
 			(_, None) => {
 				// Maximum number of pages should be always declared.
-				// This isn't a hard requirement and can be treated as a maxiumum set
+				// This isn't a hard requirement and can be treated as a maximum set
 				// to configured maximum.
 				return Err("Maximum number of pages should be always declared.");
 			}