See
https://github.com/rails/rails/commit/cb7d19b66badfbd1846c195913419c331701074e#commitcomment-2127148.

not raise so many exceptions:

  https://github.com/rails/rails/blob/master/actionpack/lib/action_view/template.rb#L126

irb(main):001:0> class Foo; def method_missing(*args); super; end end
=> nil
irb(main):002:0> $DEBUG = true
=> true
irb(main):003:0> Array(Foo.new)
Exception `NoMethodError' at (irb):1 - undefined method `to_ary' for #<Foo:0x007f854390e488>
Exception `NoMethodError' at (irb):1 - undefined method `to_a' for #<Foo:0x007f854390e488>
=> [#<Foo:0x007f854390e488>]
irb(main):004:0>

Kernel#capture replaced by version which can catch output from subprocesses

Reformat gemspec

This reverts commit 36376560, reversing
changes made to 3148ed9a.

Conflicts:
	actionpack/lib/action_dispatch/middleware/flash.rb

Reason: it broke Sam's CI

https://github.com/rails/rails/pull/8017#issuecomment-10210655

Organized the gemspec files a bit.

 * Made quotes more consistent (single quotes dominated, so I used
   that).
 * Moved license line down a line, separating it logically, and removed
   the extra whitespace before its = operator.
 * Minor whitespace fixes.

Store FlashHashes in the session as plain hashes

handle trailing slash with engines (test case for #7842)

Add test to avoid regression of 58e48d52

[ci skip]

Add app Rake tasks when -T and --dummy-path is passed to `plugin new`

Closes #8121

The `plugin new` generator always adds the dummy app rake tasks,
when a dummy app was created.

This is already handled by #find, it's a duplicate check, since
find_with_ids is not called from anywhere else.

Commit 65a2977c has introduced some
changes to format content for small devices, this change reverts the
original font size for normal screens while maintaing the same format
for these devices.

[ci skip]

[ci skip]

Permitted should be sticky on #slice

use Array() instead of flatten

* move ActiveModel::Errors tests to errors_test.rb
* add spec coverage for add_on_empty and add_on_blank

Fix some indenting for some properties and closing }, remove tabs, and
merge two pre/code definitions.

[ci skip]

Current stable guides show the "Guides Index" links without underline,
just showing it when it's hovered. This restores the same functionality
for edge guides.

Also remove annoying pointer cursor while accessing guides index,
restoring previously functionality: now the pointer cursor only appears
when hovering a link.

Closes #8107 [ci skip]