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If the -L option is used to specify a line range in git blame, and the end of the range is past the end of the file, git will fail with a fatal error. This commit prevents such behavior - instead we display the blame for existing lines within the specified range. Tests are amended accordingly. This commit also fixes two corner cases. Blaming -L n,-(n+1) now blames the first n lines of a file rather than from n to the end of the file. Blaming -L ,-n will be treated as -L 1,-n and blame the first line of the file, rather than blaming the whole file. Signed-off-by: Isabella Stephens <istephens@atlassian.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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