Documentation shows use of isNotInt that disagrees with method signature

[rosensama]

In the package documentation there are many examples for ifNotInt in the following form

    ifNotInt .age "Age must be a whole number."

But the signature expects the 2nd argument to be (String -> error), so all the examples yield a compile error of

This argument is a string of type:

    String

But `ifNotInt` needs the 2nd argument to be:

    String -> error

[neocris]

same for ifInvalidEmail