Also just set the hash value instead of merging when it's only one key.

Add a separator option for the excerpt function.

The separation option enable to keep entire words, lines or anything.
To split by line, like github, we can set the separation option as \n.
To split by word, like google, we can set the separation option as " ".
The radius option represent the number of lines or words we want to
have in the result.
The default behaviour is the same. If we don't set the separation
option, it split the text any where.

Dump schema using new style hash

Tests for session handling

Merged in f41dba27
[ci skip]

postgres, map scaled intervals to string datatype

* There is no need to delete the primary key from cloned attributes,
  since it sets the same pk to nil afterwards.
* Check for empty? instead of any? to run initialize callbacks.

Improve error message for memcache session store when dalli isn't loaded

transaction.

Check 0180e090 for more reasoning about
that.

Check 0180e090 for more reasoning about
that.

Due to a change in builder, nil values and empty strings now generates
closed tags, so instead of this:

    <pseudonyms nil=\"true\"></pseudonyms>

It generates this:

    <pseudonyms nil=\"true\"/>

Document this change in Rails so that people can track it down easily if
necessary.

Since 810a50da, the new policy is to
keep old changelogs in their own branches, to avoid manual syncing
across different branches.

Please check that commit for more reasoning about the new policy.

Use Dalli for memcache session store

AS::Callbacks: deprecate monkey patch of object callbacks

Fix eagerly loading associations without primary keys

There is no memcache gem left in repo.

Fix Changelog example in Action Mailer [ci skip]

Update Active Record CHANGELOG for #7419 [ci skip]

Ensure valid migration filename on generating migration

move validation to AR