Replace `ifNil:[...]` with `isNil ifTrue:[...]`
The latter is optimized by compilers and therefore faster.
PPAbstractParserTest PPAbstractParserTest stx:goodies/petitparser/tests 'PetitTests-Core' 0
PPArithmeticParser PPArithmeticParser stx:goodies/petitparser/tests 'PetitTests-Examples' 0
PPArithmeticParserTest PPArithmeticParserTest stx:goodies/petitparser/tests 'PetitTests-Tests' 0
PPComposedTest PPComposedTest stx:goodies/petitparser/tests 'PetitTests-Tests' 0
PPCompositeParserTest PPCompositeParserTest stx:goodies/petitparser/tests 'PetitTests-Core' 0
PPConditionalParserTest PPConditionalParserTest stx:goodies/petitparser/tests 'PetitTests-Tests' 0
PPConditionalParserTests PPConditionalParserTests stx:goodies/petitparser/tests 'PetitTests-Tests' 0
PPContextMementoTest PPContextMementoTest stx:goodies/petitparser/tests 'PetitTests-Tests' 0
PPContextTest PPContextTest stx:goodies/petitparser/tests 'PetitTests-Tests' 0
PPExpressionParserTest PPExpressionParserTest stx:goodies/petitparser/tests 'PetitTests-Tests' 0
PPExtensionTest PPExtensionTest stx:goodies/petitparser/tests 'PetitTests-Tests' 0
PPLambdaParser PPLambdaParser stx:goodies/petitparser/tests 'PetitTests-Examples' 0
PPLambdaParserTest PPLambdaParserTest stx:goodies/petitparser/tests 'PetitTests-Tests' 0
PPMappingTest PPMappingTest stx:goodies/petitparser/tests 'PetitTests-Tests' 0
PPObjectTest PPObjectTest stx:goodies/petitparser/tests 'PetitTests-Tests' 0
PPParserResource PPParserResource stx:goodies/petitparser/tests 'PetitTests-Core' 0
PPParserTest PPParserTest stx:goodies/petitparser/tests 'PetitTests-Tests' 0
PPPredicateTest PPPredicateTest stx:goodies/petitparser/tests 'PetitTests-Tests' 0
PPScriptingTest PPScriptingTest stx:goodies/petitparser/tests 'PetitTests-Tests' 0
PPTokenTest PPTokenTest stx:goodies/petitparser/tests 'PetitTests-Tests' 0
stx_goodies_petitparser_tests stx_goodies_petitparser_tests stx:goodies/petitparser/tests '* Projects & Packages *' 0