# Find all SHAS with a single line diff
SHAS=`git log --stat --oneline |\
grep "| 2 +-" -B1              |\
egrep -v "^(\s|-)"             |\
cut -d' ' -f1`

# Of those SHAS, find the ones with single character diff
git show --word-diff=plain -p --oneline `echo $SHAS` |\
egrep "(\[-|{\+).(\+}|-\])" -B10 |\
grep "$SHAS"