Input elements should not generate a class by default

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Generate a checkbox, without an explicit class.
2. Check the html output. The output should not container a class.

What is the expected output? What do you see instead?

If you make an checkbox, using
    html checkbox
       ….
the resulting code should look like
    <input type='checkbox' …>
and should not include: "class='checkbox'"

Please use labels and text to provide additional information.

The problem is with all input types. When looking at the implementation of the 
with:
at this point the class is added. This may have been convenient in the past, 
but currently is no longer needed.

Original issue reported on code.google.com by diegolon...@gmail.com on 16 Aug 2014 at 11:07