Fix 'persons' to 'people' and add some whitespace
Switch to 1.9 hash syntax
Switch to 1.9 hash syntax
Properly align some example comments
Switch to 1.9 hash syntax
create fewer relation objects
stop passing *args to generate aliases
stop hardcoding FrontBase adapter conditionals
arel columns can be used for grouping so that "weird" column names are usable
Switch to 1.9 hash syntax plus minor fixes
Switch to 1.9 hash syntax and remove unnecessary punct. 
Switch to 1.9 hash syntax
Switch to 1.9 hash syntax
Switch to 1.9 hash syntax
Switch to 1.9 hash syntax

I've intentionally left out some spots as they're the expected output, and since Hash#inspect yields `=>` I guess it may be confusing for beginners to see one syntax in the guide and a different one in their system.
Add nodoc to DummyKeyGenerator since it's a private thing
Add docs for CachingKeyGenerator
Remove extra whitespace
Remove the ActiveRecordHelper section

Since ActionView::Helpers::ActiveRecordHelper is removed.
Add a consideration note and a WIP note