"up-to-date" should only use hyphens when used as compound modifier of a noun

tools/gn/variables.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 "tools/gn/variables.h"
 
 namespace variables {
 
 // Built-in variables ----------------------------------------------------------
 
@@ skipping 968 matching lines @@
     "Script input gotchas\n"
     "\n"
     "  It may be tempting to write a script that enumerates all files in a\n"
     "  directory as inputs. Don't do this! Even if you specify all the files\n"
     "  in the inputs or sources in the GN target (or worse, enumerate the\n"
     "  files in an exec_script call when running GN, which will be slow), the\n"
     "  dependencies will be broken.\n"
     "\n"
     "  The problem happens if a file is ever removed because the inputs are\n"
     "  not listed on the command line to the script. Because the script\n"
-    "  hasn't changed and all inputs are up-to-date, the script will not\n"
+    "  hasn't changed and all inputs are up to date, the script will not\n"
     "  re-run and you will get a stale build. Instead, either list all\n"
     "  inputs on the command line to the script, or if there are many, create\n"
     "  a separate list file that the script reads. As long as this file is\n"
     "  listed in the inputs, the build will detect when it has changed in any\n"
     "  way and the action will re-run.\n"
     "\n"
     "Inputs for binary targets\n"
     "\n"
     "  Any input dependencies will be resolved before compiling any sources.\n"
     "  Normally, all actions that a target depends on will be run before any\n"
     "  files in a target are compiled. So if you depend on generated headers,\n"
     "  you do not typically need to list them in the inputs section.\n"
     "\n"
     "  Inputs for binary targets will be treated as order-only dependencies,\n"
-    "  meaning that they will be forced up-to-date before compiling or\n"
+    "  meaning that they will be forced up to date before compiling or\n"
     "  any files in the target, but changes in the inputs will not\n"
     "  necessarily force the target to compile. This is because it is\n"
     "  expected that the compiler will report the precise list of input\n"
     "  dependencies required to recompile each file once the initial build\n"
     "  is done.\n"
     "\n"
     "Example\n"
     "\n"
     "  action(\"myscript\") {\n"
     "    script = \"domything.py\"\n"
@@ skipping 713 matching lines @@
     INSERT_VARIABLE(Testonly)
     INSERT_VARIABLE(Visibility)
     INSERT_VARIABLE(WriteRuntimeDeps)
   }
   return info_map;
 }
 
 #undef INSERT_VARIABLE
 
 }  // namespace variables