Minor align BR tags with HTML void - with reference to the generators code change - https://github.com/rails/rails/commit/f038d4cc5fe1ac21f92c7e32c61ff85a0c816f3f

original commit 89984419

Reverted here ec8ef1e1

Fixing the typo which is formed a not required link.  Check
here http://api.rubyonrails.org/classes/ActionController/Base.html
under paramters section
keeping it under tt tag

gets reverted here ec8ef1e1

[ci skip] Add explanation on Rack::Sendfile middleware in rails_on_rack.md.

Expose MiddlewareStack#unshift to environment configuration

Fixing repond_with working directly on the options hash

This fixes an issue where the respond_with worked directly with the given
options hash, so that if a user relied on it after calling respond_with,
the hash wouldn't be the same.

Fixes #12029

Add documentation for after_touch [ci skip]

the instance

instance

the instance

adding load_path to include active_model in the load path of example

No reason to decompose the join objects on every iteration

the @reflections ivar.

We should consider moving the input munging outside the class
instantiation

Stop typechecking the parameter.  We know the type.

The reflections hash is supposed to be private, so let's use the API.

`instantiate` is only called once, so there is no reason to cache the
data structure on the instance and mutate itself.

similar to activerecord/examples/simple.rb

Call `rails plugin new yaffle` in the plugins guide. [ci skip]

It's confusing to not explicitly do this step.