* The options hash now takes the :views, :layout, and :locals
options but also any template-specific options. The generic
options are removed before calling the template specific render
method.
* The haml ":options" and ":haml" options are deprecated. These
should be merged in directly with the options hash.
* The sass ":sass" option is deprecated. Merge directly with the
options hash instead.
* All template engines have an app-level option named the same as
their engine (erb, haml, sass, etc.). This must be a hash and is
merged with the options passed to the render method.
* The :views_directory option is deprecated; renamed :views.
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