grep: allow -E and -n to be turned on by default via configuration
Add two configration variables grep.extendedRegexp and grep.lineNumbers to allow the user to skip typing -E and -n on the command line, respectively. Scripts that are meant to be used by random users and/or in random repositories now have use -G and/or --no-line-number options as appropriately to override the settings in the repository or user's ~/.gitconfig settings. Just because the script didn't say "git grep -n" no longer guarantees that the output from the command will not have line numbers. Signed-off-by: NJoe Ratterman <jratt0@gmail.com> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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