updated documentation for Integer [ci skip]

Make static error pages responsive

methods and outputs indented [ci skip]

Fixes #11079, prevent the counter cache from being decremented twice when destroying a record on a has_many :through association

when destroying a record on a has_many :through association.
:destroy method has own counter_cache callbacks.

Update security.md [ci skip]

Unify boolean quoting for Mysql- and Mysql2Adapter.

Fixed typo in migrations guide [ci skip]

Product model name was pluralized in example in migrations guide.
[ci skip]

addresses "ArgumentError: comparison of VerySpecialComment with SpecialComment failed" in ActiveRecord::DelegationRelationTest#test_#sort!_delegation_is_deprecated

Without this, some tests here were not actually testing anything.

Fixes problem with replacing has_one association record with itself

[ci skip]

autoload ChangeColumnDefinition (Fixes #12835)

Fix missing line and shadow on static error pages [ci skip]

Speed up Array#split when block is passed

Ruby 2.0.0p247
Rehearsal ---------------------------------------
old  10.670000   0.150000  10.820000 ( 10.822651)
new   8.520000   0.050000   8.570000 (  8.571825)
----------------------------- total: 19.390000sec

          user     system      total        real
old  10.620000   0.170000  10.790000 ( 10.790409)
new   8.570000   0.110000   8.680000 (  8.686051)

Array#in_groups: documentation updated [ci skip]

Array#split preserving the calling array

Remove @order attribute from collector

Ruby 1.8 legacy. Since 1.9 hash preserves insertion order. No need for additional array to achieve this

Improve Errors when Controller Name or Action isn't specfied

Add test for ActiveRecord::Relation YAML serialization, for #5303 issue

Update tzinfo

Include the tzinfo-data in the generated Gemfile on Windows.

instead of 'rake test' as shortcut, use 'rake'.

Closes #12780 [ci skip]