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When using show_tool_help from git-difftool we will want it to print "git difftool" not "git mergetool" so use "git ${TOOL_MODE}tool". Signed-off-by: John Keeping <john@keeping.me.uk> Signed-off-by: David Aguilar <davvid@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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