Remove j alias for ERB::Util.json_escape
Fix eagerly loading associations without primary keys
Unset association when existing record is destroyed.

To avoid foreign key errors (and invalid data) in the database, when a belongs_to association is destroyed, it should also be nil'd out on the parent object.
AR::Relation#model would be a better API than AR::Relation#klass
update ActiveModel::Conversion documentation [ci skip]
update ActiveModel::Errors documentation and minor fixes [ci skip]
add documentation and examples to ActiveModel::Errors [ci skip]
update ActiveModel::Errors#include? documentation [ci skip]
update ActiveModel::Lint documentation [ci skip]
fixed a typo
fixed another typo in edge guides
add description ActiveModel::StrictValidationField [ci skip]
update ActiveModel::Model documentation [ci skip]
Merge pull request #104 from udaykadaboina/typofix

fixed a typo [ci skip]
update ActiveModel::Naming documentation
Added a feature to add a database task. e.g. OracleDatabaseTasks
Fixed example in 1.2 so help will be defined as the text implies
fix punctuation in activemodel/errors [ci skip]
update ActiveModel::Name documentation [ci skip]
corrected URLs and controller benchmark method call