`Tags::Base#select_content_tag`.

Previously, passing a falsey value to `include_blank` would be ignored if the
field was required, and a blank line would still be inserted. The following will
now raise instead of quietly failing:

`select("post", "category", %w(a required field), { include_blank: false }, required: 'required')`

While we don't want to change the form input when validations fail,
blindly using `_before_type_cast` will cause the input to display the
wrong data for any type which does additional work on database values.

This reverts commit 787e22bb.

We should never be ignoring valuable information that the types may need
to give us. The reason that it originally used `_before_type_cast` is
unclear, but appears to date back long enough that the reasons may not
be relevant today. There is only one test that asserts that it uses the
before type cast version, but it gives no context as to why and uses a
mock which does not simulate the real world.

Fixes #18523.

* use public_send instead of send to avoid calling private
  methods in form helpers

If a file field tag is passed the multiple option, it is turned into an
array field (appending "[]"), but if the file field is passed an
explicit name as an option, leave the name alone (do not append "[]").

Fixes #9830

If an explicit name has been given and it already ends with "[]"

Before:

    select(:category, [], {}, multiple: true, name: "post[category][]")
    # => <select name="post[category][][]" ...>

After:

    select(:category, [], {}, multiple: true, name: "post[category][]")
    # => <select name="post[category][]" ...>

When you have an explicit index set, then when you build an input tag
with :multiple => true, it doesn't add [] to the end of its name, although
it should.

When a select tag is created for a field with errors, then the inserted
options will errantly have a <div class="field_with_errors"> wrapping
them.

and display size 1 and not multiple attribute,  Fixes #5908

Fixes #5324 by removing default size options from input:text and default cols and rows options from textarea.

* Extract value sanitization from default name and id method and new
  collection helpers;
* No need to sanitize value in default name and id always;
* Improve value_before_type_cast to avoid concating the same method name
  string twice.

[Carlos Antonio da Silva + Rafael Mendonça França]

[Carlos Antonio da Silva + Rafael Mendonça França]

Raise a better error if anyone wants to create your own ActionView::Helpers::Tags::Base child and do not implement the render method