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The memory allocation scheme for the textconv interface is a bit tricky, and not well documented. It was originally designed as an internal part of diff.c (matching fill_mmfile), but gradually was made public. Refactoring it is difficult, but we can at least improve the situation by documenting the intended flow and enforcing it with an in-code assertion. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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