Updated guides with latest method [ci skip]

for blank?
fixed file name references [ci skip]
Updated guides with latest method [ci skip]
Removed doc of removed method diff [ci skip]
Fix the SQLite gem name
Add packages list for ArchLinux [ci skip]

Add the packages required on Arch Linux when setting up the development
dependencies
grab executable from rubygems

As done here d7fc97d3f90c0e30865d32ce202658f03248cacc
Excluding action_view/vendor in API [ci skip]
Revert "Fix the SQLite gem name"

This reverts commit 700c6c65bcce17d4c61423ceaef031bcbe203337.

Bot the `sqlite3` and `sqlite3-ruby` gems exist.
https://rubygems.org/gems/sqlite3
https://rubygems.org/gems/sqlite3-ruby

In fact, they both point to the same github repository.
https://github.com/luislavena/sqlite3-ruby

However, the last one hasn't been released since 2011, while the first
one keeps getting regular releases.
Removed excluding vendor from API doc [ci skip]

These folder not exists in system
Refix my misreading of the diff

sorry @robin850.
Thanks @fxn
Merge pull request #11611 from arunagw/api-generation-av

Excluding action_view/vendor in API[ci skip]
Add a SQL example for `not` [ci skip]

To share a certain logic across other examples, let's add a sample SQL
code generated by the given Ruby code
Use hyphenated version of assert_url [ci skip]
Fixes typo in Object#try!
Update Rails 3.2.x guide link [ci skip]
Merge pull request #11620 from spajus/update_docs

Update Rails 3.2.x guide link [ci skip]
Minor refactor - Uses Enumerable#to_a instead of iterate and add to an
array
Merge pull request #11625 from phstc/minor-refactor-code-gardener-grouping

Minor refactor - Uses Enumerable#to_a instead of iterate and add to an array
fix order dependent test

`ReflectionTest` uses column information in tests and those tests break
if tests are run in random order.