fixed element properties for highlighted text

[dreizehnutters]

When RichText elements are used with the highlight attributes, the generated document contains errors.

Fixing the xml properties seemed to produce correct documents.

Proof-of-Concept code:

from docxtpl import RichText, DocxTemplate

tpl = DocxTemplate('poc.docx')
YELLOW = 'ffe699'

normal_string = 'Lorem ipsum dolor sit amet, consectetur adipisici elit'
rich_string = 'String with a yellow highlight'

rt_embedded = RichText(f'{rich_string}', highlight=YELLOW)

context = {
    'example' : rt_embedded,
}

tpl.render(context)
tpl.save('richtext.docx')

current:

fixed:

[dreizehnutters]

🎉