Merge pull request #10954 from arunagw/update_docs_for_const_regexp

Updated the doc for const_regexp [ci skip]
Merge pull request #10727 from pacoguzman/fix-xml-mini-tests

Fix XmlMini different backends tests
reorder finder methods list alphabetically
Use xml instead already parsed xml
Rewind StringIO instances before be parsed again
Merge pull request #10960 from pacoguzman/fix-build-due-to-10727

Fix build after #10727
change rails verison to 4.0.0 in command line
Fix TOC ul markup
collection tags accept html attributes as the last element of collection
Merge pull request #10964 from nashby/collection-html-options

collection tags accept html attributes as the last element of collection
Creating a class to build the default middleware stack.

A lot of logic for building the default middleware stack is currently
kept in Application class, but this can be encapsulated and made more
modular by being moved to its own class. Also refactored a couple of the
helper methods.
Removing a repetitive comment and refactoring the Application class in
Railties.

The comment on the +env_config+ method is repetitive, likely to get
outdated, and provides no useful information which cannot be gleamed
from the code. I'm therefore removing it. I'm also refactoring the check
for the presence of a secret_token in the configuration.
Use a case insensitive URI Regexp for #asset_path

Context: https://gist.github.com/radar/5793814

The `URI_REGEXP` that various AssetUrl helpers use is currently case
sensitive when checking for a URI scheme. This means if you try to pass
a URL like `HTTP://www.example.com/path/to/image.jpg`, you end up with
a bogus asset path: `/assets/HTTP://www.example.com/path/to/image.jpg`.

URLs are case insensitive, so this regexp should be as well.

Signed-off-by: David Celis <me@davidcel.is>
Merge pull request #10969 from davidcelis/case-insensitive-asset-path

Use a case insensitive URI Regexp for #asset_path
Add CHANGELOG entry for #10969

[ci skip]
Escape the string even when the condition of link_to_unless is not satisfied.
Added test for link_to_unless to make sure the result consistency.
Merge pull request #10942 from yangchenyun/mine

correct documentation about active_record.default_timezone
rewrote render tag using more succinct and idiomatic way
Use Colspan in th Tags

Is it more suitable that using ```<th colspan="3">``` instead of three empty ```<th>```? It is simple, but what i am missing about it?

Change repetitive th tags to use colspan attribute

Update CHANGELOG.md

Update CHANGELOG.md