missing_blanks() being applied too much?

[roovyshapiro]

Need to do further testing to determine if missing_blanks() is being applied too often. Since it can apply to any line. The only condition is that it doesn't get applied to a line with 5 underscores so it isn't applied to the same line twice. Maybe this needs to be nerfed a bit and have a randomization element added to it.

if random.randint(0,3):
    then run missing_blanks()

This probably holds true for scrambled_line() as well since it also has no conditionals.