Remove/stop 'redactor-inline-converted'

Question

Not specifically a Craft problem but I'm struggling to find an answer from Redactors site.

I've got over 100 occurrences of class="redactor-inline-converted" littered throughout the markup of Rich Text fields. How can I stop Redactor adding this class?

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Update 2016-04-26

Here's the steps to recreate this. It's an odd thing between Redactor and Word.

1. Have styled text in Word with a superscript
2. Copy / paste in to Craft
3. Add some text and format it
4. Check the source and Redactor will add class="redactor-inline-converted"

This happens randomly on all tags:

<strong class="redactor-inline-converted"><em class="redactor-inline-converted">Superscript</em></strong>
<ul><li><em class="redactor-inline-converted">list item</em></li></ul>

Video example: http://sendvid.com/h41rosb3

Answer 1

Not a solution, but I strip it out as part of a cleanup macro that runs on body text.

{% macro cleanup(string) -%}
    {%- if string|length -%}
        {{- string|typogrify|replace('<p><br></p>','')|replace('redactor-inline-converted','')|raw -}}
    {%- endif -%}
{%- endmacro %}