FIX: Erroneous parsing of \tt-XXX and \ttx-XXX: Need to restrict the tokentype group because otherwise it would match too much if some sort of braces are mixed on a single line.

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# - Tests need this version for "load_XXX_from_file()"
# - But Sphinx yields errors on Python 2.7 (also with Pygments 2.0.1)
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Pygments>=2.2