Convert gn docstrings to C++11 raw strings.

tools/gn/setup.cc

Index: tools/gn/setup.cc
diff --git a/tools/gn/setup.cc b/tools/gn/setup.cc
index 240c11f660a12cb9d9cd8296adbc5f08f13efd18..c5eace2219f5df5f38f477d82159e7108309c381 100644
--- a/tools/gn/setup.cc
+++ b/tools/gn/setup.cc
@@ -41,87 +41,84 @@
 #endif
 
 extern const char kDotfile_Help[] =
-    ".gn file\n"
-    "\n"
-    "  When gn starts, it will search the current directory and parent\n"
-    "  directories for a file called \".gn\". This indicates the source root.\n"
-    "  You can override this detection by using the --root command-line\n"
-    "  argument\n"
-    "\n"
-    "  The .gn file in the source root will be executed. The syntax is the\n"
-    "  same as a buildfile, but with very limited build setup-specific\n"
-    "  meaning.\n"
-    "\n"
-    "  If you specify --root, by default GN will look for the file .gn in\n"
-    "  that directory. If you want to specify a different file, you can\n"
-    "  additionally pass --dotfile:\n"
-    "\n"
-    "    gn gen out/Debug --root=/home/build --dotfile=/home/my_gn_file.gn\n"
-    "\n"
-    "Variables\n"
-    "\n"
-    "  buildconfig [required]\n"
-    "      Label of the build config file. This file will be used to set up\n"
-    "      the build file execution environment for each toolchain.\n"
-    "\n"
-    "  check_targets [optional]\n"
-    "      A list of labels and label patterns that should be checked when\n"
-    "      running \"gn check\" or \"gn gen --check\". If unspecified, all\n"
-    "      targets will be checked. If it is the empty list, no targets will\n"
-    "      be checked.\n"
-    "\n"
-    "      The format of this list is identical to that of \"visibility\"\n"
-    "      so see \"gn help visibility\" for examples.\n"
-    "\n"
-    "  exec_script_whitelist [optional]\n"
-    "      A list of .gn/.gni files (not labels) that have permission to call\n"
-    "      the exec_script function. If this list is defined, calls to\n"
-    "      exec_script will be checked against this list and GN will fail if\n"
-    "      the current file isn't in the list.\n"
-    "\n"
-    "      This is to allow the use of exec_script to be restricted since\n"
-    "      is easy to use inappropriately. Wildcards are not supported.\n"
-    "      Files in the secondary_source tree (if defined) should be\n"
-    "      referenced by ignoring the secondary tree and naming them as if\n"
-    "      they are in the main tree.\n"
-    "\n"
-    "      If unspecified, the ability to call exec_script is unrestricted.\n"
-    "\n"
-    "      Example:\n"
-    "        exec_script_whitelist = [\n"
-    "          \"//base/BUILD.gn\",\n"
-    "          \"//build/my_config.gni\",\n"
-    "        ]\n"
-    "\n"
-    "  root [optional]\n"
-    "      Label of the root build target. The GN build will start by loading\n"
-    "      the build file containing this target name. This defaults to\n"
-    "      \"//:\" which will cause the file //BUILD.gn to be loaded.\n"
-    "\n"
-    "  secondary_source [optional]\n"
-    "      Label of an alternate directory tree to find input files. When\n"
-    "      searching for a BUILD.gn file (or the build config file discussed\n"
-    "      above), the file will first be looked for in the source root.\n"
-    "      If it's not found, the secondary source root will be checked\n"
-    "      (which would contain a parallel directory hierarchy).\n"
-    "\n"
-    "      This behavior is intended to be used when BUILD.gn files can't be\n"
-    "      checked in to certain source directories for whatever reason.\n"
-    "\n"
-    "      The secondary source root must be inside the main source tree.\n"
-    "\n"
-    "Example .gn file contents\n"
-    "\n"
-    "  buildconfig = \"//build/config/BUILDCONFIG.gn\"\n"
-    "\n"
-    "  check_targets = [\n"
-    "    \"//doom_melon/*\",  # Check everything in this subtree.\n"
-    "    \"//tools:mind_controlling_ant\",  # Check this specific target.\n"
-    "  ]\n"
-    "\n"
-    "  root = \"//:root\"\n"
-    "\n"
-    "  secondary_source = \"//build/config/temporary_buildfiles/\"\n";
+    R"(.gn file
+
+  When gn starts, it will search the current directory and parent directories
+  for a file called ".gn". This indicates the source root. You can override
+  this detection by using the --root command-line argument
+
+  The .gn file in the source root will be executed. The syntax is the same as a
+  buildfile, but with very limited build setup-specific meaning.
+
+  If you specify --root, by default GN will look for the file .gn in that
+  directory. If you want to specify a different file, you can additionally pass
+  --dotfile:
+
+    gn gen out/Debug --root=/home/build --dotfile=/home/my_gn_file.gn
+
+Variables
+
+  buildconfig [required]
+      Label of the build config file. This file will be used to set up the
+      build file execution environment for each toolchain.
+
+  check_targets [optional]
+      A list of labels and label patterns that should be checked when running
+      "gn check" or "gn gen --check". If unspecified, all targets will be
+      checked. If it is the empty list, no targets will be checked.
+
+      The format of this list is identical to that of "visibility" so see "gn
+      help visibility" for examples.
+
+  exec_script_whitelist [optional]
+      A list of .gn/.gni files (not labels) that have permission to call the
+      exec_script function. If this list is defined, calls to exec_script will
+      be checked against this list and GN will fail if the current file isn't
+      in the list.
+
+      This is to allow the use of exec_script to be restricted since is easy to
+      use inappropriately. Wildcards are not supported. Files in the
+      secondary_source tree (if defined) should be referenced by ignoring the
+      secondary tree and naming them as if they are in the main tree.
+
+      If unspecified, the ability to call exec_script is unrestricted.
+
+      Example:
+        exec_script_whitelist = [
+          "//base/BUILD.gn",
+          "//build/my_config.gni",
+        ]
+
+  root [optional]
+      Label of the root build target. The GN build will start by loading the
+      build file containing this target name. This defaults to "//:" which will
+      cause the file //BUILD.gn to be loaded.
+
+  secondary_source [optional]
+      Label of an alternate directory tree to find input files. When searching
+      for a BUILD.gn file (or the build config file discussed above), the file
+      will first be looked for in the source root. If it's not found, the
+      secondary source root will be checked (which would contain a parallel
+      directory hierarchy).
+
+      This behavior is intended to be used when BUILD.gn files can't be checked
+      in to certain source directories for whatever reason.
+
+      The secondary source root must be inside the main source tree.
+
+Example .gn file contents
+
+  buildconfig = "//build/config/BUILDCONFIG.gn"
+
+  check_targets = [
+    "//doom_melon/*",  # Check everything in this subtree.
+    "//tools:mind_controlling_ant",  # Check this specific target.
+  ]
+
+  root = "//:root"
+
+  secondary_source = "//build/config/temporary_buildfiles/"
+)";
 
 namespace {