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.
Upgraded jquery-rails gem version
fix interplay of humanize and html_escape
Merge pull request #13953 from seanwalbran/fix-humanize-match-reference

fix interplay of humanize and html_escape
Fixed "Hash#to_param confused by empty hash values #13892"
Move test to the right file
Test with a blank value
Refatoring the method to avoid shot-circuit return
Add CHANGELOG entry

Closes #13909
Fix to_query with empty arrays too
update contribution doc grammar. [ci skip]

- Manually applied from #13951.
- Discussion at #13947.
- Removed trailing whitespace from https://github.com/dpmehta02/rails/commit/18044e86af93672dfc38befbe974261e87b3518d

/cc @dpmehta02
synchronize 4.1 release notes with CHANGELOGS. [ci skip]

/cc @chancancode