Generator\Character with a contains() method
Implementing Generator\Character::shrink()
Added example test for Character, end2end test, and shortcut function
Added Character::printableAscii
Added charPrintableAscii Generator function
Modifying the signature of Generator\char() for forward compatibility
Introducing Antecedent\PrintableCharacter
Added printableCharacters() plural Antecedent
Removed PHPUnit 4.x advice, it's now the only supported version
More verbose error message for tests that fail only on Travis with PHP 5.4
Given we throwing away many characters, we need to lower the minimumEvaluationRatio
Implementing Generator\Character::shrink()
Extracted Internal ArithmeticProgression
Merge branch 'char_generator'