Improve documentation for fast-unstake pallet (#14101)

* improve documentation of fast-unstake pallet

* using Sam's crate now

* fix

* remove stuff not needed

* Some updates

* use new prelude.

* update

* some other fancy docs

* Update frame/fast-unstake/src/lib.rs

Co-authored-by: Liam Aharon <liam.aharon@hotmail.com>

* Update frame/support/procedural/src/pallet/expand/mod.rs

Co-authored-by: Liam Aharon <liam.aharon@hotmail.com>

* update

* Update frame/fast-unstake/src/lib.rs

Co-authored-by: Keith Yeung <kungfukeith11@gmail.com>

* update

* fix no_std issue by updating to latest version of docify

* get things compiling by adding a use for StakingInterface

* fix docify paths to their proper values, still not working because bug

* embed working 🎉

* update syn

* upgrade to docify v0.1.10 for some fixes

* Apply suggestions from code review

Co-authored-by: Juan <juangirini@gmail.com>
Co-authored-by: Gonçalo Pestana <g6pestana@gmail.com>

* improve docs

* Update frame/support/procedural/src/pallet/expand/doc_only.rs

Co-authored-by: Juan <juangirini@gmail.com>

* fmt

* fix

* Update frame/support/procedural/src/pallet/expand/doc_only.rs

Co-authored-by: Muharem Ismailov <ismailov.m.h@gmail.com>

* Update frame/support/procedural/src/pallet/expand/config.rs

Co-authored-by: Muharem Ismailov <ismailov.m.h@gmail.com>

* Update frame/support/procedural/src/pallet/expand/config.rs

Co-authored-by: Muharem Ismailov <ismailov.m.h@gmail.com>

* remove redundant

* update docify rev

* update.

* update.

* update lock file

---------

Co-authored-by: Liam Aharon <liam.aharon@hotmail.com>
Co-authored-by: Keith Yeung <kungfukeith11@gmail.com>
Co-authored-by: Sam Johnson <sam@durosoft.com>
Co-authored-by: Juan <juangirini@gmail.com>
Co-authored-by: Gonçalo Pestana <g6pestana@gmail.com>
Co-authored-by: Muharem Ismailov <ismailov.m.h@gmail.com>
Co-authored-by: parity-processbot <>

substrate/frame/support/src/lib.rs

@@ -1520,6 +1520,17 @@ pub mod tests {
 	}
 }
 
+/// Prelude to be used for pallet testing, for ease of use.
+#[cfg(feature = "std")]
+pub mod testing_prelude {
+	pub use super::{
+		assert_err, assert_err_ignore_postinfo, assert_err_with_weight, assert_error_encoded_size,
+		assert_noop, assert_ok, assert_storage_noop, bounded_btree_map, bounded_vec,
+		parameter_types, traits::Get,
+	};
+	pub use sp_arithmetic::assert_eq_error_rate;
+}
+
 /// Prelude to be used alongside pallet macro, for ease of use.
 pub mod pallet_prelude {
 	pub use crate::{