[GR-2738] Various minor cleanups.

.../src/com/oracle/truffle/r/ffi/processor/FFIProcessor.java

...her/src/com/oracle/truffle/r/launcher/RscriptCommand.java

...y/src/com/oracle/truffle/r/library/fastrGrid/LPoints.java

.../oracle/truffle/r/library/fastrGrid/device/SVGDevice.java

...rary/src/com/oracle/truffle/r/library/utils/Download.java

.../com/oracle/truffle/r/nodes/builtin/base/BasePackage.java

.../src/com/oracle/truffle/r/nodes/builtin/base/Lengths.java

...oracle/truffle/r/nodes/builtin/base/OptionsFunctions.java

...oracle/truffle/r/nodes/test/BinaryArithmeticNodeTest.java

...m/oracle/truffle/r/nodes/binary/BinaryArithmeticNode.java

...racle/truffle/r/nodes/binary/BinaryArithmeticSpecial.java

...c/com/oracle/truffle/r/runtime/data/NativeDataAccess.java

.../oracle/truffle/r/runtime/data/model/RAbstractVector.java

...rc/com/oracle/truffle/r/runtime/data/nodes/GetDataAt.java

...com/oracle/truffle/r/runtime/data/nodes/GetDataStore.java

...ruffle/r/test/engine/shell/TestJLineConsoleCompleter.java

.../oracle/truffle/r/test/library/fastr/TestJavaInterop.java