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.
Raise an exception when unserialization fails due to a missing class
Turning on warnings in "rake test" for railties
fix inverse_of association in block of new child

This fixes inconsistency when building children of association
which has inverse_of set properly.

When creating new association object with a block:

    parent.association.build do |child|
      child.parent.equal?(parent) # false
    end

So the block the `child.parent` did not point to the same object.
But when the object is created it points to same instance:

    child = parent.association.build
    child.parent.equal?(parent) # true
change merge to merge! in AS on new hashes
Added missing assert
Merge pull request #10042 from choudhuryanupam/fix_activesupport_test

Added missing assert
Merge pull request #10041 from vipulnsward/more_destructive_merge

change merge to merge! in AS on new hashes
Use released sdoc
Fix #new with an STI object with complex inheritance
Merge pull request #10038 from nateberkopec/sti-new-with-complex-inheritance

Fix regression re: #new with an STI object & complex inheritance
replace #merge with relation API calls in calculations_test.
Merge pull request #10048 from senny/replace_merge_with_relation_calls_in_count_api

replace #merge with relation API calls in calculations_test.
no need to invoke to_s before applying intern
Remove all error masking when decoding serialized data fails?