Add linebreaks to --trace-codegen output.

src/codegen.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/codegen.h"
 
 #if defined(V8_OS_AIX)
 #include <fenv.h>  // NOLINT(build/c++11)
 #endif
 #include "src/bootstrapper.h"
@@ skipping 104 matching lines @@
     print_ast = FLAG_print_builtin_ast;
     ftype = "builtin";
   } else {
     print_source = FLAG_print_source;
     print_ast = FLAG_print_ast;
     ftype = "user-defined";
   }
 
   if (FLAG_trace_codegen || print_source || print_ast) {
     base::SmartArrayPointer<char> name = info->GetDebugName();
-    PrintF("[generating %s code for %s function: %s]", kind, ftype, name.get());
+    PrintF("[generating %s code for %s function: %s]\n", kind, ftype,
+           name.get());
   }
 
 #ifdef DEBUG
   if (info->parse_info() && print_source) {
     PrintF("--- Source from AST ---\n%s\n",
            PrettyPrinter(info->isolate()).PrintProgram(info->literal()));
   }
 
   if (info->parse_info() && print_ast) {
     PrintF("--- AST ---\n%s\n",
@@ skipping 87 matching lines @@
       os << "source_position = " << literal->start_position() << "\n";
     }
     code->Disassemble(debug_name.get(), os);
     os << "--- End code ---\n";
   }
 #endif  // ENABLE_DISASSEMBLER
 }
 
 }  // namespace internal
 }  // namespace v8