some more work on formatting

...c/com/oracle/truffle/r/nodes/builtin/base/Expression.java

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

...uffle.r.test/src/com/oracle/truffle/r/test/S4/TestS4.java

...rc/com/oracle/truffle/r/test/builtins/TestBuiltin_La.java

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

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

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

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