[XeTeX] extra line with RTL languages in parcolumns

[Gildas Hamel]

I* N'eus ket pell (2023-08-19 ouzh 07:56), e skrivas Gildas Hamel <gweltaz at ucsc.edu>:

  >   I used \begin{otherlanguage}{arabic} and \end{otherlanguage} as in babel, but there is still the problem of the indent. --Gildas 
  
  I tried again, setting \setRL and \setLR outside of \colchunk and using % on \colchunk{% to eliminate space. Text and pdf attached.
--Gildas
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