zeroOrMore() and oneOrMore() do not generat correct results

The expression:

regex().add("Java").zeroOrMore().build();

should generate the regex: /(?:Java)*/, just as the expression:

regex().maybe("Java").build();

generates the regex: /(?:Java)?/. However, the first expression actually generates the regex: /Java*/, which is not correct. The oneOrMore() method suffers from the similar problem.

I propose to change both zeroOrMore() and oneOrMore() to accept a string, much as the maybe() method does so it can return the correct result.

Start by locating zeroOrMore(), oneOrMore(), and maybe() in the Java source, then compare how each method builds its regex fragment. Reproduce the examples from the issue and inspect existing tests, if present. Done means repetition applies to the complete added expression and the generated regex matches the expected grouped form for both methods.