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/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.");
 			}