* Fix output of wrongly outputted error
The "Tombstoned a contract that is below the subsistence threshold: {:?}" was
triggered when too few balance was provided. It was a false alarm.
* Fix return of wrong code_len
* Split up `NotCallable` into more fine grained errors
* Fix typos in docs
Co-authored-by: Keith Yeung <kungfukeith11@gmail.com>
* RentNotPayed -> RentNotPaid
* Fix typo: payed -> paid
It is OK to change the in-storage field name because:
1. The SCALE encoding is not based on names only on position.
2. The struct is not public (only to the crate).
Co-authored-by: Keith Yeung <kungfukeith11@gmail.com>