Convert gn docstrings to C++11 raw strings.

tools/gn/function_read_file.cc

 // Copyright (c) 2013 The Chromium 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 "base/files/file_util.h"
 #include "tools/gn/err.h"
 #include "tools/gn/filesystem_utils.h"
 #include "tools/gn/functions.h"
 #include "tools/gn/input_conversion.h"
 #include "tools/gn/input_file.h"
 #include "tools/gn/scheduler.h"
 
 // TODO(brettw) consider removing this. I originally wrote it for making the
 // WebKit bindings but misundersood what was required, and didn't need to
 // use this. This seems to have a high potential for misuse.
 
 namespace functions {
 
 const char kReadFile[] = "read_file";
 const char kReadFile_HelpShort[] =
     "read_file: Read a file into a variable.";
 const char kReadFile_Help[] =
-    "read_file: Read a file into a variable.\n"
-    "\n"
-    "  read_file(filename, input_conversion)\n"
-    "\n"
-    "  Whitespace will be trimmed from the end of the file. Throws an error\n"
-    "  if the file can not be opened.\n"
-    "\n"
-    "Arguments:\n"
-    "\n"
-    "  filename\n"
-    "      Filename to read, relative to the build file.\n"
-    "\n"
-    "  input_conversion\n"
-    "      Controls how the file is read and parsed.\n"
-    "      See \"gn help input_conversion\".\n"
-    "\n"
-    "Example\n"
-    "  lines = read_file(\"foo.txt\", \"list lines\")\n";
+    R"(read_file: Read a file into a variable.
+
+  read_file(filename, input_conversion)
+
+  Whitespace will be trimmed from the end of the file. Throws an error if the
+  file can not be opened.
+
+Arguments
+
+  filename
+      Filename to read, relative to the build file.
+
+  input_conversion
+      Controls how the file is read and parsed. See "gn help input_conversion".
+
+Example
+
+  lines = read_file("foo.txt", "list lines")
+)";
 
 Value RunReadFile(Scope* scope,
                   const FunctionCallNode* function,
                   const std::vector<Value>& args,
                   Err* err) {
   if (args.size() != 2) {
     *err = Err(function->function(), "Wrong number of arguments to read_file",
                "I expected two arguments.");
     return Value();
   }
@@ skipping 18 matching lines @@
     *err = Err(args[0], "Could not read file.",
                "I resolved this to \"" + FilePathToUTF8(file_path) + "\".");
     return Value();
   }
 
   return ConvertInputToValue(scope->settings(), file_contents, function,
                              args[1], err);
 }
 
 }  // namespace functions