Fix regexp in generators for right catching error message

Merge pull request #1787 from cmeiklejohn/make_fragment_for_more_robust_for_subclasses_of_safe_buffer

fragment_for assumes ActionView::OutputBuffer.

Do not change a frozen text passed to simple_format text helper 

Removing shadowing outer local variables warnings

Add missing require 'set'

assets:clean task now cleans up images

Removing require_relative gem. Linecache new version 0.46 is out and it's

Removing require_relative gem. Linecache new version 0.46 is out and it's loading rbx-require-relative > 0.0.4

Fix default options argument on ActiveRecord::ConnectionAdaptors::Table#column_exists?

Fix inconsistencies with serving images in production mode when ActiveRecord is loaded

Add option to omit creating an instance reader method on class_attribute

Solving the problem of links being broken in GitHub for the sake of api site

Fix inconsistencies by being polite to the wrapped body. Needed for Rack::Sendfile to function properly. See issue #1761.

Changed the default value for the options argument on ActiveRecord::ConnectionAdapters::Table#column_exists? from nil to an empty Hash {}.

That method calls through to ActiveRecord::ConnectionAdapters::SchemaStatements##column_exists? expects options to be a Hash.

When options was nil, an error would occur in cases where the column did exist because the called method attempted to perform a key lookup on options.

To solve the problem of links being broken in GitHub for the sake of api site, have them replaced at runtime during rdoc generation

pointing to files/*/*.html for usage in api.rubyonrails.org and as a
result are broken in GitHub blobs. This is unavoidable (at least for now).

* Changes should better reflect present code behavior
* Related to issue: https://github.com/rails/rails/issues/1624

This allows the following: "rails g scaffold Post title body:text author"