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由 Junio C Hamano 提交于
Some implementations do not know what to do with -H; define NO_H_OPTION_IN_GREP when you build git if your grep lacks -H. Most of the time, it can be worked around by prepending /dev/null to the argument list, but that causes -L and -c to slightly misbehave (they both expose /dev/null is given), so when these options are given, do not run external grep that does not understand -H. Signed-off-by: NJunio C Hamano <junkio@cox.net>
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