* zadean/syntax_tools/add_missing_unwrap/OTP-16012/PR-2348:
  Update test suite
  Also unwrap map_type_* name and value
  Add unwrap calls to map_field_* in erl_syntax

Add record with exact and associated map types to type_specs.erl. The
record forces the erl_parse format for map types to be retained.

Add test wrapped_subtrees to the test suite. It ensures that each
erl_parse node it encounters can be wrapped and accessed with
erl_syntax:subtrees/1 without error.

This adds missing calls to unwrap/1 for the map_field_* name and value functions and puts them inline with map_expr_fields/1.
Using these functions with "wrapped" nodes fails with badarg.

This reverts commit 425889ba69b69a9b6fb14bfbef121d51b78e853a.

A link that used to work for 'make edocs' only, now works for 'make
release_docs' and on erlang.org as well.

This reverts commit 0118046f9bda8dcf3594184fa439b79267db8017.