Fixed typo [ci skip]

singular is more suited to
change to "check out"
e-mail => email, and subject/verb agreement
add punctuation
Remove duplicate configuration option for ActiveSupport [ci skip]

Fixes rails/rails#13732
`requies` => `requires`
`easiy` => `easy`
`framwork` => `framework`
Remove old comments about suppressing warnings.
Fixed spelling error: `extracetd` => `extracted`
context in validation goes through has many relationship
Merge pull request #13974 from laurocaetano/test_case_for_autosave_with_accepts_nested_attributes

Add test case for autosave association with nested attributes.
Fixed an issue where reloading of removed dependencies would cause an unexpected circular dependency error
Skips tests on Windows that create files with illegal characters
Merge pull request #13977 from Octember/master

Fixed an issue where reloading of removed dependencies would cause an un...
Merge pull request #13979 from mellowi/windows_disallowed_static_files_skipped

Skips tests on Windows that create files with illegal characters
Skips linked folder tests if symlink is invalid
Merge pull request #13980 from mellowi/skipping_linked_folder_tests_if_symlink_is_invalid

Skips linked folder tests if symlink is invalid
Merge pull request #13978 from Fortisque/kevin/validation_context_for_children

context in validation goes through has many relationship
Reaper has access to threadsafe active? call