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Add a new print_config_from_gitmodules() helper function to print values from .gitmodules just like "git config -f .gitmodules" would. This will be used by a new submodule--helper subcommand to be able to access the .gitmodules file in a more controlled way. Signed-off-by: Antonio Ospite <ao2@ao2.it> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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