Talk to the grader. Tell him your handwriting sucks and that's why you typed it. (Show him your handwriting sucks, if you want.) Tell him you've talked to classmates with similar work who got full credit. See what he says.

If the grader gives you a reasonable answer, accept it. If not, go to the professor and repeat what you explained to the grader.

You won't be labeled a "troublemaker" unless you make trouble, usually... so just be honest and courteous. Profs and graders get students all the time that have questions about their grades.

Lastly, in the grand scheme of things, an A vs a B doesn't matter all that much when you're getting a job. All the companies I interviewed with at my college's job fair were more interested in my projects and extra-curricular stuff than my GPA. I wish I had been on some open-source project that I could've put on my resume, because that would have opened many more doors than a 0.01 GPA bump.