Do not gsub non ASCII characters in header anchor.
Fix the hash key being delete from env

It was changed by mistake at c5d64b2b86aa42f57881091491ee289b3c489c7e.
Merge pull request #15242 from JuanitoFatas/guides-anchor

[Guides] Do not gsub non ASCII characters in header anchor.
Allow additional arguments to be used during type map lookups

Determining things like precision and scale in postgresql will require
the given blocks to take additional arguments besides the OID.

- Adds the ability to handle additional arguments to `TypeMap`
- Passes the column type to blocks when looking up PG types
Use the generic type map for all PG type registrations

We're going to want all of the benefits of the type map object for
registrations, including block registration and real aliasing. Moves
type name registrations to the adapter, and aliases the OIDs to the
named types
Merge pull request #15248 from sgrif/sg-additional-type-map-args

Allow additional arguments to be used during type map lookups
Merge pull request #15249 from sgrif/sg-register-types-in-adapter

Use the generic type map for all PG type registrations
resolved reorder issue in rails active record guide