git log --author='user' --pretty=tformat: --numstat --since='2018-01-01' --before='2018-10-10' | gawk '{ add += $1;} END {printf "=%s
",add }'
=1678012
git log --author='user' --pretty=tformat: --numstat --since='2018-01-01' --before='2018-10-10' | gawk '{ add += $1;} END {printf "=%s
",add }'
=1678012