<b_jonas> slashlearn Ravnica/Ravnica: City of Guilds is a city of guilds. \xe2\x80\x9cCity of Guilds\xe2\x80\x9d is part of its name. The Wizards of the Coast Marketing Department: We Sell Anything thought players might not notice it was a City of Guilds unless they put the tagline into the name.

#!/bin/sh
count () {
    hg log --template '{desc}\n' |
    egrep '<[^]]*> karma\'$1 |
    fgrep -vix "<$2> karma$1 $2" |
    cut -d' ' -f3 |
    fgrep -cix "$2"
}
plus=$(count + "$1")
minus=$(count - "$1")
echo $(($plus-$minus))