Revision 47387ccb

b/configure.ac
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  # Note: Character classes ([...]) need to be double quoted due to autoconf
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  # using m4
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  elif ! echo "$sphinxver" | grep -q -E '^Sphinx[[[:space:]]]+(\(sphinx-build\)[[[:space:]]]+|v)[[1-9]]\>'; then
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  elif ! echo "$sphinxver" | grep -q -E \
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       '^Sphinx[[[:space:]]]+(\(sphinx-build\)[[[:space:]]]+|v)[[1-9]]\>'; then
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    AC_MSG_ERROR([Sphinx 1.0 or higher is required])
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  fi
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fi

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