[Flashcards/KELLIA] Content is Dependent on the XML Wrapping Width

[pishoyg]

Bug discovered in 6279509. Reproducing the commit message:

[Flashcards/KELLIA] Run make flashcards test to pick up changes.
The changes are supposed to affect formatting only. However, they seem
to have caused the flashcards pipeline to insert a lot of
tags
unnecessarily.

Here is how this happened:

• We start wrapping the source XML files at 80 characters.
• Our KELLIA binary reads them, and passes the content as is to the
  output TSV's.
• Our Flashcards binary reads the TSV's, and replaces the newline
  characters with
  tags.

This looks like a bug that need to be resolved. Let's do it when we are
more fluent in KELLIA! (The code is mostly copied.)

#140 introduced a parameter to help solve the problem.

I believe the path forward is:

• The KELLIA pipeline produces well-formatted HTML.
• In the Flashcards pipeline, we do NOT convert any newlines to <br/> tags.

P.S. It's cleaner to do the above for all Flashcard pipelines.

[pishoyg]

#146 is a more general version of this issue.

[pishoyg]

Tidy has a add-xml-space flag that could be helpful (see).

[pishoyg]

NOTE: #265.

[pishoyg]

This may no longer be the case. We need to verify.