Use ActionView::OutputBuffer#safe_append= from templates
avoid extra method calls for appending newlines

before:

        ');@output_buffer.append= ( content_icon row[:content] );@output_buffer.safe_concat('
');@output_buffer.safe_concat('        ');@output_buffer.append= ( spinner_img );@output_buffer.safe_concat('
');@output_buffer.safe_concat('      </td>
      <td class="content">
        ');@output_buffer.append= ( content_link row[:content] );@output_buffer.safe_concat('
');@output_buffer.safe_concat('      </td>
      <td class="message">
');

after:

        ';@output_buffer.append=( content_icon row[:content] );@output_buffer.safe_append='
        ';@output_buffer.append=( spinner_img );@output_buffer.safe_append='
      </td>
      <td class="content">
        ';@output_buffer.append=( content_link row[:content] );@output_buffer.safe_append='
      </td>
      <td class="message">
';
+ Add test for auto timestamps update of both old & new parent records
Modifies belong_to touch callback to touch old associations also #9091
bugfix, when matching multiple paths with `get`, `post`, ...

This problem was introduced with:

https://github.com/rails/rails/commit/d03aa104e069be4e301efa8cefb90a2a785a7bff
routing shorthand syntax works with multiple paths

Closes #9913.

We need to expand the match shorthand syntax for every path.
Revert grep to select since they are not the same

A previous commit swapped out a call to select for a call to grep in
time_zone_options_for_select. This behavior actually causes the
regexp priority option to stop working.

ActiveSupport::TimeZone overrides the =~ operator which is what the
select block was using previously. Enumerable#grep
checks pattern === element and in this case that would be /US/ ===
ActiveSupport::TimeZone which does not work because
ActiveSupport::TimeZone does not supply an implicit converting to_str
method, only an explicit to_s method.

It would be impossible to provide a to_str method that behaves
identically to the =~ method provided on ActiveSupport::TimeZone
so the only option is to revert back to using select with =~.
Add regression test for TZ grep

Added a regression test that will fail if anyone tries to change
time_zone_select to use grep again thinking it will work when it does
not.
Raise an exception when unserialization fails due to a missing class
Allow transparent upgrading of legacy signed cookies to encrypted cookies; Automatically configure cookie-based sessions to use the best cookie jar given the app's config
reverts changes to Rails.version made in #8501
fix wrong argument error message
remove unused match variables in selector
remove unused variable and assignment
cleanup railties test; fix typos
Merge pull request #10012 from vipulnsward/fix_AP_error_message_error

fix wrong argument error message [ci skip]
Merge pull request #10014 from vipulnsward/remove_unused_match_var

remove unused match variables in selector
Merge pull request #10015 from vipulnsward/remove_unused_variable_in_get

remove unused variable and assignment
Merge pull request #10017 from vipulnsward/railties_cleanups

cleanup railties test; fix typos
fix request methods test