GN: Format more gn files

build/config/templates/templates.gni

 # Copyright 2015 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.
 
 # Declare a target for processing a template.
 #
 # Variables
 #   input: The template file to be processed.
 #   output: Where to save the result.
 #   variables: A list of variables to make available to the template
 #     processing environment, e.g. ["name=foo", "color=red"].
 #
 # Example
 #   file_template("chrome_shell_manifest") {
 #     input = "shell/java/AndroidManifest.xml"
 #     output = "$target_gen_dir/AndroidManifest.xml"
 #     variables = "app_name=chrome_shell app_version=1"
 #   }
 template("file_template") {
   set_sources_assignment_filter([])
 
   if (defined(invoker.testonly)) {
     testonly = invoker.testonly
   }
 
-  assert(defined(invoker.input),
-      "The input file must be specified")
-  assert(defined(invoker.output),
-      "The output file must be specified")
+  assert(defined(invoker.input), "The input file must be specified")
+  assert(defined(invoker.output), "The output file must be specified")
   assert(defined(invoker.variables),
-      "The variable used for substitution in templates must be specified")
+         "The variable used for substitution in templates must be specified")
 
   variables = invoker.variables
 
   action(target_name) {
-    if(defined(invoker.visibility)) {
+    if (defined(invoker.visibility)) {
       visibility = invoker.visibility
     }
 
     script = "//build/android/gyp/jinja_template.py"
     depfile = "$target_gen_dir/$target_name.d"
 
-    sources = [ invoker.input ]
-    outputs = [ invoker.output, depfile ]
+    sources = [
+      invoker.input,
+    ]
+    outputs = [
+      invoker.output,
+      depfile,
+    ]
 
     args = [
       "--inputs",
       rebase_path(invoker.input, root_build_dir),
       "--output",
       rebase_path(invoker.output, root_build_dir),
       "--depfile",
       rebase_path(depfile, root_build_dir),
-      "--variables=${variables}"
+      "--variables=${variables}",
     ]
   }
 }