unit test failed in analyzer_test.go

[leolee192]

>> go test
# github.com/strace/sequence
./analyzer_test.go:188:59: Sprintf format %s has arg len(atree.levels[l]) of wrong type int
FAIL    github.com/strace/sequence [build failed]

[leolee192]

@zhenjl I'm interested in continue development of this project. Would I join the project?