Restore clang-format formatting.

tools/gn/xcode_writer.cc

Index: tools/gn/xcode_writer.cc
diff --git a/tools/gn/xcode_writer.cc b/tools/gn/xcode_writer.cc
index b6c0bc66679f17e403168d56bdc33ad3c2246281..633a1c8db5ea35b354ff3bfb5297aa3c1628dae4 100644
--- a/tools/gn/xcode_writer.cc
+++ b/tools/gn/xcode_writer.cc
@@ -36,15 +36,10 @@ struct SafeEnvironmentVariableInfo {
   bool capture_at_generation;
 };
 
-// clang-format off
 SafeEnvironmentVariableInfo kSafeEnvironmentVariables[] = {
-    {"HOME", true},
-    {"LANG", true},
-    {"PATH", true},
-    {"USER", true},
-    {"TMPDIR", false},
+    {"HOME", true}, {"LANG", true},    {"PATH", true},
+    {"USER", true}, {"TMPDIR", false},
 };
-// clang-format on
 
 XcodeWriter::TargetOsType GetTargetOs(const Args& args) {
   const Value* target_os_value = args.GetArgOverride(variables::kTargetOs);