Fixed timezone mapping of Ulaanbaatar.
Merge pull request #9937 from zolzaya/master

Asia/Ulaanbaatar is incorrect mapping

Fixes #9936
s/and and run/and runs/

Fixing some typos/grammar.
Merge pull request #9939 from dchapman1988/master

Fixing some typo(s)/grammar.
respect auto_increment in rename_column for mysql
Merge pull request #9928 from vipulnsward/fix_rename_auto_increment_mysql

respect auto_increment in rename_column for mysql
Combine tests and restore columns dropped by hstore testing

Disabling the hstore extension during testing created order dependent
test failures.
Merge pull request #9876 from macksmind/restore_cols_dropped_by_hstore_test

Restore columns dropped by hstore test
Make connection_handler overridable per thread
drop variable assignment in validations
Merge pull request #9945 from vipulnsward/drop_var_in_validations

Drop variable assignment in validations
Use thor master since 0.18.0 has a regression

See
https://github.com/wycats/thor/commit/08265a380d0ff3fce014e98e87bb8c2330858e4a
for the discussion and https://github.com/wycats/thor/pull/316 for the
fix
mention strong parameters in complex forms section of the guides.

Closes #9921.
Merge pull request #8368 from SamSaffron/master

Allow connection_handler to be overriden per-thread
Merge pull request #9947 from senny/strong_params_doc_for_complex_forms

mention strong parameters in complex forms section of the guides.
drop errors constant
Fixed typos in activerecord
Merge pull request #9952 from prathamesh-sonpatki/AR-typos

Fixed typos in activerecord
Merge pull request #9949 from vipulnsward/drop_yaml_error_constant

drop errors constant