more test refactoring: fix formatting, fix escape sequences, enable passing tests

...est/src/com/oracle/truffle/r/test/ExpectedTestOutput.test

...le/truffle/r/test/library/base/TestConditionHandling.java

...cle/truffle/r/test/library/base/TestSimpleAttributes.java

...racle/truffle/r/test/library/base/TestSimpleBuiltins.java

...acle/truffle/r/test/library/base/TestSimpleFunctions.java

...oracle/truffle/r/test/library/base/TestSimpleVectors.java

...om/oracle/truffle/r/test/testrgen/TestrGenBuiltinArg.java

...m/oracle/truffle/r/test/testrgen/TestrGenBuiltinConj.java

.../truffle/r/test/testrgen/TestrGenBuiltinDate2POSIXlt.java

...acle/truffle/r/test/testrgen/TestrGenBuiltinEncoding.java

...uffle/r/test/testrgen/TestrGenBuiltinEncodingassign_.java

...e/truffle/r/test/testrgen/TestrGenBuiltinISOdatetime.java

...com/oracle/truffle/r/test/testrgen/TestrGenBuiltinIm.java

...com/oracle/truffle/r/test/testrgen/TestrGenBuiltinLa.java

...om/oracle/truffle/r/test/testrgen/TestrGenBuiltinMod.java

.../truffle/r/test/testrgen/TestrGenBuiltinPOSIXlt2Date.java

...cle/truffle/r/test/testrgen/TestrGenBuiltinPrimitive.java

...com/oracle/truffle/r/test/testrgen/TestrGenBuiltinRe.java

...oracle/truffle/r/test/testrgen/TestrGenBuiltinReduce.java

...acle/truffle/r/test/testrgen/TestrGenBuiltinSyschmod.java