I really hate using sprintf, mainly because i always have to go online
and look up the syntax. I figured i could make that a Little easier.
Now you can print floats with different Precision as easily as:
4.123456.to_s(1) # => "4.1"
4.123456.to_s(3) # => "4.12"
4.123456.to_s(3) # => "4.123"
4.123456.to_s(4) # => "4.1235" (Note the auto rounding from 4.123456)
4.123456.to_s # => "4.123456"
