Restructure dispatch macro related exports (#1162)

* restructure dispatch macro related exports

* moved Dispatchable to lib.rs

* fix .gitignore final newline

* ".git/.scripts/commands/fmt/fmt.sh"

* fix rustdocs

* wip

---------

Co-authored-by: Liam Aharon <liam.aharon@hotmail.com>
Co-authored-by: command-bot <>
Co-authored-by: ordian <write@reusable.software>

substrate/frame/assets/src/benchmarking.rs

@@ -23,10 +23,7 @@ use super::*;
 use frame_benchmarking::v1::{
 	account, benchmarks_instance_pallet, whitelist_account, whitelisted_caller, BenchmarkError,
 };
-use frame_support::{
-	dispatch::UnfilteredDispatchable,
-	traits::{EnsureOrigin, Get},
-};
+use frame_support::traits::{EnsureOrigin, Get, UnfilteredDispatchable};
 use frame_system::RawOrigin as SystemOrigin;
 use sp_runtime::traits::Bounded;
 use sp_std::prelude::*;

substrate/frame/assets/src/lib.rs

@@ -160,12 +160,12 @@ pub use types::*;
 use scale_info::TypeInfo;
 use sp_runtime::{
 	traits::{AtLeast32BitUnsigned, CheckedAdd, CheckedSub, Saturating, StaticLookup, Zero},
-	ArithmeticError, TokenError,
+	ArithmeticError, DispatchError, TokenError,
 };
 use sp_std::prelude::*;
 
 use frame_support::{
-	dispatch::{DispatchError, DispatchResult},
+	dispatch::DispatchResult,
 	ensure,
 	pallet_prelude::DispatchResultWithPostInfo,
 	storage::KeyPrefixIterator,