contributors.sh: better grep pattern, use grep -a

# awk them into RELEASE-NOTES format

(

git log $start..HEAD | \

egrep -i '(Author|Commit|by):' | \

egrep -ai '(^Author|^Commit|by):' | \

cut -d: -f2- | \

cut '-d<' -f1 | \

tr , '\012' | \

sed 's/ and /\n/' | \

sed -e 's/^ //' -e 's/ $//g' -e 's/@users.noreply.github.com$/ on github/'

grep "^  [^ \(]" RELEASE-NOTES| \

grep -a "^  [^ \(]" RELEASE-NOTES| \

sed 's/, */\n/g'| \

sed 's/^ *//'

)| \

sed -f ./docs/THANKS-filter | \

grep ' ' | \

grep -a ' ' | \

sort -fu | \

awk '{

 num++;