Tests for mixed braille and ink

[bertfrees]

Addresses requirements:

• 4.5:86
• 4.5:87

[bertfrees]

4.5:87 requires synchronisation between the source and the braille. Liblouis already offers synchronisation with great precision. So what we are missing is

• some way of having synchronisation points between an OBFL and the resulting PEF
• some way of including print text in a PEF.

[joeha480]

For pre-translated braille some addition to OBFL is needed. If translation is done while formatting, changes to OBFL isn't needed, but of course some change to the code. PEF supports other namespaces, so one could always add the text in custom attributes on each row (that was actually part of PEF initially). However, if you want to style the inkprint, some other solution is needed.

[bertfrees]

Yes good point about OBFL.

I don't think we need to style the inkprint. Maybe we need to add spaces between words so that they align with the braille. But otherwise we don't have to modify PEF, then the foreign attribute is indeed a good solution. Thanks