use standard attach.R

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

...in/src/com/oracle/truffle/r/nodes/builtin/base/R/attach.R

...m/oracle/truffle/r/nodes/builtin/methods/R/RMethodUtils.R

...le.r.runtime/src/com/oracle/truffle/r/runtime/RError.java

...me/src/com/oracle/truffle/r/runtime/env/REnvironment.java

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

...le.r.test/src/com/oracle/truffle/r/test/all/AllTests.java

...t/src/com/oracle/truffle/r/test/failing/FailingTests.java

.../com/oracle/truffle/r/test/simple/TestSimpleBuiltins.java