Fixed R6Class() to pass without internal errors.

...n/src/com/oracle/truffle/r/nodes/builtin/base/Format.java

...racle/truffle/r/nodes/builtin/base/infix/AccessField.java

...racle/truffle/r/nodes/builtin/base/infix/UpdateField.java

...ruffle/r/nodes/access/vector/CachedReplaceVectorNode.java

...acle/truffle/r/nodes/access/vector/ElementAccessMode.java

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

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

...m/oracle/truffle/r/test/library/base/TestSimpleLists.java