Fix help and error messages.

tools/gn/function_toolchain.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/err.h"
 #include "tools/gn/functions.h"
 #include "tools/gn/parse_tree.h"
 #include "tools/gn/scheduler.h"
 #include "tools/gn/scope.h"
 #include "tools/gn/settings.h"
@@ skipping 35 matching lines @@
     "\n"
     "  A toolchain specifies the commands to run for various input file\n"
     "  types via the \"tool\" call (see \"gn help tool\") and specifies\n"
     "  arguments to be passed to the toolchain build via the\n"
     "  \"toolchain_args\" call (see \"gn help toolchain_args\").\n"
     "\n"
     "Invoking targets in toolchains:\n"
     "\n"
     "  By default, when a target depends on another, there is an implicit\n"
     "  toolchain label that is inherited, so the dependee has the same one\n"
-    "  as the dependant.\n"
+    "  as the dependent.\n"
     "\n"
     "  You can override this and refer to any other toolchain by explicitly\n"
     "  labeling the toolchain to use. For example:\n"
     "    datadeps = [ \"//plugins:mine(//toolchains:plugin_toolchain)\" ]\n"
     "  The string \"//build/toolchains:plugin_toolchain\" is a label that\n"
     "  identifies the toolchain declaration for compiling the sources.\n"
     "\n"
     "  To load a file in an alternate toolchain, GN does the following:\n"
     "\n"
     "   1. Loads the file with the toolchain definition in it (as determined\n"
@@ skipping 236 matching lines @@
     return Value();
 
   Scope::KeyValueMap values;
   block_scope.GetCurrentScopeValues(&values);
   toolchain->args() = values;
 
   return Value();
 }
 
 }  // namespace functions