Prepare commit in accordance with NSPCC format

beautify.sh

#!/bin/sh

if [ -z "$1" ]; then
	echo "Issue must be provided."
	exit 1
fi

ISSUE="[#$1]"
BRANCH=${2:-master}
BASE=$(git merge-base HEAD "$BRANCH")

# Note: \U is a GNU sed extension.
export GIT_EDITOR="sed -i -E -e '1 s/^[^[].*/$ISSUE \0/' -e '1 s/: [a-z]/\U\0/'"
git rebase "$BASE" --exec "git commit --amend --signoff --allow-empty"