Removing : warning: ambiguous first argument;
Merge pull request #8975 from arunagw/warning_removed_ambiguous_first_argument

Removing : warning: ambiguous first argument;
Remove useless || operation
spelling correction for AM interceptors
Merge pull request #8976 from senny/spelling_correction

spelling correction for Action Mailer interceptors
Fix ActionDispatch::Request#formats when HTTP_ACCEPT header is empty string
Remove i18n symbol dependency

date.order is the only key in rails i18n that is required to be a
symbol. This patch allows for symbols or strings which means:

* No requirement for symbol type in .yml files. A future
  YAML.safe_load wouldn't need to load symbols
* Rails could actually use json rather than yml as the backend
Don't change the original i18n data
repeating documentation for date and time form helpers
repeating documentation for option form helpers
for recommended Apache configuration of asset pipeline, use <Location> instead of <LocationMatch>,
to avoid unnecessary reg ex parsing and code
<http://httpd.apache.org/docs/2.2/mod/core.html#location
(recommended by @jja). - @erikj
Refactor predicate builder when receiving empty hash

There's no need to create a new arel table or reflect on the column
association if the value is empty, these attributes are not used.

Also no need to concat a new array, just append the query value.
iterates the RDoc of update_column(s)

This revision makes crystal clear that the methods go
straight to the database and update the receiver. It
also adds and example, and removes the duplication
in the singular and plural forms by referring one to
the other.
use tap with block parameter
script => bin
s/it's/its/

[ci skip]
Remove useless number sign

I think that these signs are probably mistake.
Merge pull request #8912 from senny/8879_association_empty_method

`CollectionAssociation#empty?` respects newly builded records
CollectionProxy should be default scoped

Fixes #8795
Undeprecate the :extend option

Suggested by @dhh.

It doesn't affect the generated SQL, so seems reasonable to continue to
allow it as an association option.