Run these command in one of your git repositories:
git log --pretty=%s | wc -l
Result: 104
git log --pretty=%s | grep -v "\s" | wc -l
Result: 0
To explain what the commands do:
git log --pretty=%s
Lists all of your commit messages:
grep -v "\s"
Filter output of the above command to only lines without whitespace
wc -l
Counts the number of filtered lines
What did you get?