Unambiguous concatenation of ignored parsers.
Rename the ignored ++ ignored test.
Add an XCTFail wrapper returning false.
assertEqual over T? where T: Equatable returns Bool.
assertEqual over Either<T, U>? returns Bool.
assertEqual over [T]? returns Bool.
assertNil returns Bool.
assertNotNil returns Bool.
assertEqual over ()?.
Slight tweak to doc comment.
Ignoring distributes over alternation.
Merge pull request #26 from robrix/unambiguous-ignorance

Unambiguous ignorance