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由 Kristian Høgsberg 提交于
Encode ' ' using '=20' even though rfc2047 allows using '_' for readability. Unfortunately, many programs do not understand this and just leave the underscore in place. Using '=20' seems to work better. [jc: with adjustment to t3901] Signed-off-by: NKristian Høgsberg <hoegsberg@gmail.com> Signed-off-by: NJunio C Hamano <junkio@cox.net>
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