tests/test-gendoc-sv.t

parsers: protect some case-folding tables from clang-format

We want a slightly weird format here so that it's easier to read, but
in order to preserve that we need to disable clang-format.

Differential Revision: https://phab.mercurial-scm.org/D1168

#require docutils gettext

  $ $TESTDIR/check-gendoc sv
  checking for parse errors