minor formatting fixes

...fle.r.engine/src/com/oracle/truffle/r/engine/REngine.java

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

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

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

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

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

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

....r.engine/src/com/oracle/truffle/r/engine/repl/RREPL.java

...ngine/src/com/oracle/truffle/r/engine/shell/RCommand.java

.../src/com/oracle/truffle/r/library/fastr/FastRCompile.java

.../src/com/oracle/truffle/r/library/fastr/FastRContext.java

...ry/src/com/oracle/truffle/r/library/fastr/FastRDebug.java

...rc/com/oracle/truffle/r/library/fastr/FastRPkgSource.java

...c/com/oracle/truffle/r/library/fastr/FastRStackTrace.java

...c/com/oracle/truffle/r/library/fastr/FastRSyntaxTree.java

...ry/src/com/oracle/truffle/r/library/fastr/FastRTrace.java

...ary/src/com/oracle/truffle/r/library/fastr/FastRTree.java

...rc/com/oracle/truffle/r/library/fastr/FastRTreeStats.java

.../src/com/oracle/truffle/r/library/graphics/RGraphics.java

...oracle/truffle/r/library/methods/MethodsListDispatch.java