work around Java number formatting bug for small numbers

...fle/r/nodes/builtin/base/printer/DoubleVectorPrinter.java

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

...uffle.r.test/src/com/oracle/truffle/r/test/S4/TestR5.java

...c/com/oracle/truffle/r/test/builtins/TestBuiltin_abs.java

.../oracle/truffle/r/test/builtins/TestBuiltin_asdouble.java

...m/oracle/truffle/r/test/builtins/TestBuiltin_deparse.java

...c/com/oracle/truffle/r/test/builtins/TestBuiltin_exp.java

.../com/oracle/truffle/r/test/builtins/TestBuiltin_list.java

...oracle/truffle/r/test/builtins/TestBuiltin_operators.java

...c/com/oracle/truffle/r/test/builtins/TestBuiltin_sep.java

...com/oracle/truffle/r/test/builtins/TestBuiltin_split.java

.../oracle/truffle/r/test/builtins/TestBuiltin_tdefault.java

...om/oracle/truffle/r/test/builtins/TestBuiltin_unlist.java