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2.6.3 If-then-else½ñ¼°¤Î¾ÜºÙ¤ÊÀâÌÀ

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--old-group-format='#ifndef name
%<#endif /* ! name */
' \
--new-group-format='#ifdef name
%>#endif /* name */
' \
--unchanged-group-format='%=' \
--changed-group-format='#ifndef name
%<#else /* name */
%>#endif /* name */
'

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