remove unnecesarry end-of-line comments, remove unnecessary newlines

...rc/com/oracle/truffle/r/engine/RRuntimeASTAccessImpl.java

...ine/src/com/oracle/truffle/r/engine/TruffleRLanguage.java

...c/com/oracle/truffle/r/engine/interop/DLLDotSymbolMR.java

...ne/src/com/oracle/truffle/r/engine/interop/DLLInfoMR.java

.../com/oracle/truffle/r/engine/interop/NativeCharArray.java

...om/oracle/truffle/r/engine/interop/NativeCharArrayMR.java

...om/oracle/truffle/r/engine/interop/NativeDoubleArray.java

...m/oracle/truffle/r/engine/interop/NativeIntegerArray.java

...oracle/truffle/r/engine/interop/NativeIntegerArrayMR.java

...m/oracle/truffle/r/engine/interop/NativeLogicalArray.java

...oracle/truffle/r/engine/interop/NativeLogicalArrayMR.java

...rc/com/oracle/truffle/r/engine/interop/NativeNACheck.java

...c/com/oracle/truffle/r/engine/interop/NativeRawArray.java

...com/oracle/truffle/r/engine/interop/NativeRawArrayMR.java

...com/oracle/truffle/r/engine/interop/NativeUInt8Array.java

...ne/src/com/oracle/truffle/r/engine/interop/RDoubleMR.java

...c/com/oracle/truffle/r/engine/interop/REnvironmentMR.java

...c/com/oracle/truffle/r/engine/interop/RExternalPtrMR.java

...e/truffle/r/engine/interop/RForeignAccessFactoryImpl.java

.../src/com/oracle/truffle/r/engine/interop/RFunctionMR.java