[interpreter] Add checks for source position to test-bytecode-generator.

test/cctest/interpreter/test-bytecode-generator.cc

Index: test/cctest/interpreter/test-bytecode-generator.cc
diff --git a/test/cctest/interpreter/test-bytecode-generator.cc b/test/cctest/interpreter/test-bytecode-generator.cc
index b51ebca02416d6bc337d51d4b2ab5f2c596a2dcc..a2f98ba35ce60ccaaace4de8474d389752229353 100644
--- a/test/cctest/interpreter/test-bytecode-generator.cc
+++ b/test/cctest/interpreter/test-bytecode-generator.cc
@@ -108,6 +108,9 @@ std::string BuildActual(const BytecodeExpectationsPrinter& printer,
     if (prologue) source_code += prologue;
     source_code += snippet;
     if (epilogue) source_code += epilogue;
+    if (source_code.size() > 0 && source_code.back() != '\n') {
+      source_code += '\n';

[rmcilroy, 2016/05/09 15:36:52]

Does this get hit in the current code? Is there a corresponding implicit newline
in the generate_bytecode_expectations?

+    }
     printer.PrintExpectation(actual_stream, source_code);
   }
   return actual_stream.str();