Fix doc in Postgres database creation
add active model basics wip to guides/documents.yaml
support :unless_exist for FileCache
Fixed typo with after_commit docs

Fixed syntax error on `after_commit` docs
Merge pull request #12648 from chrisledet/patch-1

Fixed typo with after_commit docs
Remove surprise if from show_exception middleware

This increase the readability within the rescue block.
Merge pull request #12655 from rails/ps-remove-surprise-if-in-show-exception-middleware

Remove surprise if from show_exception middleware
don't mutate hash with fetch
Merge pull request #12656 from dougcole/fix_strong_parameters_fetch

don't let StrongParameters mutate the hash with fetch
added schema_migrations_table_name to ActiveRecord::Base in order that the name of the schema migrations table can be configured.

consolidated test_schema_migrations_table_name tests

Added changelog entry

edited changelog

removed commented lines

removed reader

ensure the schema migrations table is reset at end of test

added entry to configuration guide

guides typo and changelog order
Add a changelog entry for #12656 [ci skip]
Add a note about ensuring the version is right for the adapter (since you might well have specified the right gem, but locked it to too low of a version)
Merge pull request #12661 from robin850/patch-10

Add a changelog entry for #12656 [ci skip]
set accessors in the set_accessors! method
Removal of javascript related gems when creating an app

Commit 0417bc8 add the coffee-rails and javascript runtime gems even
when passing the --skip-javascript option but this is not the desired
behavior.

Also remove all javascript related stuff in the generated application
such as the vendor/assets/javascripts folder.
get a list of gems when filling out the gemfile
add the database gem
use the GemfileGem object for more entries
Merge pull request #12657 from robin850/skip-javascript

Removal of javascript related files when creating an app
refactor Gemfile template