Access ivars via instance reader methods for consistency

Refactor ShowExceptions' #call to use def-rescue instead of begin-rescue

Remove begin-rescue in favor of def-rescue

Introduce ./bin for your app's executables: bin/bundle, bin/rails, bin/rake

Introduce ./bin for your app's executables: bin/bundle, bin/rails, bin/rake. Executable scripts are versioned code like the rest of your app. To generate a stub for a bundled gem: 'bundle binstubs unicorn' and 'git add bin/unicorn'

All the valids parameters for libpq are used.

See http://www.postgresql.org/docs/9.1/static/libpq-connect.html for the
full list

Fixes #8784

masgn and response variable

Refactor DebugExceptions

Refactor Journey::Routes

* prefer do-end for multiline blocks
* prefer or-equals over returns with checks

doesn't work with rubinius

Rubinius returns a boolean after such assingment
response = (_, headers, body = @app.call(env))

see https://github.com/rubinius/rubinius/issues/2117

get rid of a local variable

Fix error raised when assigning NaN to an integer column

Also covers any non-castable case by returning nil, which
is in-line with the intention of the former implementation,
but covers the odd cases which respond to to_i but raise
an error when it's called, such as NaN, Infinity and -Infinity.

Fixes #8757

* dependencies/autoload
* concern
* deprecation

refactor the naming within plugin new generator

Fix img width in guides

Require 'active_support/core_ext/module/aliasing' in the infinite_comparable module

When requiring 'active_support/core_ext', the following error is raised:

   undefined method `alias_method_chain' for Date:Class (NoMethodError)

Adding the missing require to this module fixes the problem.

* core_ext/object/blank
* concern
* core_ext/class/attribute
* deprecation

Avoid swallowing all exceptions that might happen when requiring
debugger, just catch a LoadError if it cannot be loaded.

Check for more background:
https://github.com/rails/rails/commit/28fd867c9bc790636d37a28f288791cd0089a6fd#commitcomment-2386952

It is used by the table formatter only, and it's already inside a routes
directory that namespaces it properly, so calling it just "table" seems
simpler.

It feels more consistent to have this class called "HtmlTableFormatter",
and to have it here with the routes inspector and console formatter,
since it's used for both routing error exceptions and the rails info
page.