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* Make sure files are being read/written in UTF-8. Set encoding while writing HTML output. Also set encoding while writing and reading .tix files although we don't yet have a ticket complaining that this poses problems. * Set encoding in html header to utf8 * Upgrade to new version of 'hpc' library and reuse `readFileUtf8` and `writeFileUtf8` functions * Update git submodule for `hpc` * Bump up `hpc` executable version Co-authored-by: Ben Gamari <ben@smart-cactus.org> (cherry picked from commit afb23168)
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