make sure both headers are set before checking for ip spoofing
"generates" applies to "collection radio" so it should be singular
take out reference to previous versions of Rails
Revert ""generates" applies to "collection radio" so it should be singular"

This reverts commit faeb33dc036e4f707491c91a23ee3e990573141b.

Reason: Code changes can't be done on docrails
Updated with latest method [ci skip]
Updated the file path [ci skip]
Updated guides with latest method [ci skip]
Removed doc of diff method [ci skip]
asset_url => asset-url in sass-rails docs [ci skip]
EncryptedCookieStore => CookieStore [ci skip]
Remove HelperyTestHelper not used in any test

HelperyTestHelper was introduced in 66ef922 by @josevalim
to pair with HelperyTestController. This test controller was
later removed in e10a253 by @strzalek, leaving HelperyTestHelper unused
surplus : in attachment_fu plugin

surplus ':' character in url
incorrect urls 

I've found two incorrects urls for adding ':' at the end of the url
incorrect url

incorrect url
Fix Show link on resource
`skiping` => `skipping`
use active voice and use more descriptive terms
Fix link_to return value
The documentation is showing the link_to method as just returning
the contents of the url_for method. It should be returning an
"<a>" tag with the correct href set.
added "id: false" to HABTM join table example

Based on the instructions further down in section 3.3.2.
Added missing active record configurations.