Convert gn docstrings to C++11 raw strings.

tools/gn/command_ls.cc

Index: tools/gn/command_ls.cc
diff --git a/tools/gn/command_ls.cc b/tools/gn/command_ls.cc
index 4d14e0fa1d6491360178186a402dcade759ded3c..676ff579a166734144acfe1a0f375a6d7fd72916 100644
--- a/tools/gn/command_ls.cc
+++ b/tools/gn/command_ls.cc
@@ -19,51 +19,52 @@ const char kLs[] = "ls";
 const char kLs_HelpShort[] =
     "ls: List matching targets.";
 const char kLs_Help[] =
-    "gn ls <out_dir> [<label_pattern>] [--all-toolchains] [--as=...]\n"
-    "      [--type=...] [--testonly=...]\n"
-    "\n"
-    "  Lists all targets matching the given pattern for the given build\n"
-    "  directory. By default, only targets in the default toolchain will\n"
-    "  be matched unless a toolchain is explicitly supplied.\n"
-    "\n"
-    "  If the label pattern is unspecified, list all targets. The label\n"
-    "  pattern is not a general regular expression (see\n"
-    "  \"gn help label_pattern\"). If you need more complex expressions,\n"
-    "  pipe the result through grep.\n"
-    "\n"
-    "Options\n"
-    "\n"
+    R"(gn ls <out_dir> [<label_pattern>] [--all-toolchains] [--as=...]
+      [--type=...] [--testonly=...]
+
+  Lists all targets matching the given pattern for the given build directory.
+  By default, only targets in the default toolchain will be matched unless a
+  toolchain is explicitly supplied.
+
+  If the label pattern is unspecified, list all targets. The label pattern is
+  not a general regular expression (see "gn help label_pattern"). If you need
+  more complex expressions, pipe the result through grep.
+
+Options
+
+)"
     TARGET_PRINTING_MODE_COMMAND_LINE_HELP
-    "\n"
+"\n"
     ALL_TOOLCHAINS_SWITCH_HELP
-    "\n"
+"\n"
     TARGET_TESTONLY_FILTER_COMMAND_LINE_HELP
-    "\n"
+"\n"
     TARGET_TYPE_FILTER_COMMAND_LINE_HELP
-    "\n"
-    "Examples\n"
-    "\n"
-    "  gn ls out/Debug\n"
-    "      Lists all targets in the default toolchain.\n"
-    "\n"
-    "  gn ls out/Debug \"//base/*\"\n"
-    "      Lists all targets in the directory base and all subdirectories.\n"
-    "\n"
-    "  gn ls out/Debug \"//base:*\"\n"
-    "      Lists all targets defined in //base/BUILD.gn.\n"
-    "\n"
-    "  gn ls out/Debug //base --as=output\n"
-    "      Lists the build output file for //base:base\n"
-    "\n"
-    "  gn ls out/Debug --type=executable\n"
-    "      Lists all executables produced by the build.\n"
-    "\n"
-    "  gn ls out/Debug \"//base/*\" --as=output | xargs ninja -C out/Debug\n"
-    "      Builds all targets in //base and all subdirectories.\n"
-    "\n"
-    "  gn ls out/Debug //base --all-toolchains\n"
-    "      Lists all variants of the target //base:base (it may be referenced\n"
-    "      in multiple toolchains).\n";
+R"(
+Examples
+
+  gn ls out/Debug
+      Lists all targets in the default toolchain.
+
+  gn ls out/Debug "//base/*"
+      Lists all targets in the directory base and all subdirectories.
+
+  gn ls out/Debug "//base:*"
+      Lists all targets defined in //base/BUILD.gn.
+
+  gn ls out/Debug //base --as=output
+      Lists the build output file for //base:base
+
+  gn ls out/Debug --type=executable
+      Lists all executables produced by the build.
+
+  gn ls out/Debug "//base/*" --as=output | xargs ninja -C out/Debug
+      Builds all targets in //base and all subdirectories.
+
+  gn ls out/Debug //base --all-toolchains
+      Lists all variants of the target //base:base (it may be referenced
+      in multiple toolchains).
+)";
 
 int RunLs(const std::vector<std::string>& args) {
   if (args.size() == 0) {