gn desc: printing public_deps without --all and --tree

tools/gn/command_desc.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 <stddef.h>
 
 #include <algorithm>
 #include <set>
 #include <sstream>
 
@@ skipping 354 matching lines @@
   Configs can have child configs. Specifying --tree will show the hierarchy.
 
 Printing outputs
 
   The "outputs" section will list all outputs that apply, including the outputs
   computed from the tool definition (eg for "executable", "static_library", ...
   targets).
 
 Printing deps
 
-  Deps will include all public, private, and data deps (TODO this could be
-  clarified and enhanced) sorted in order applying. The following may be used:
+  Deps could include public, private and data deps.
+
+  If the command is invoked with --tree or --all, deps will include all public,
+  private and data deps. If the command is invoked without --tree and --all deps
+  will only include private and data deps. In this case public deps will be
+  printed as part of the section "public_deps". Deps will be sorted in order
+  applying. The following may be used:
 
   --all
       Collects all recursive dependencies and prints a sorted flat list. Also
       usable with --tree (see below).
 )"
 
     TARGET_PRINTING_MODE_COMMAND_LINE_HELP
 "\n"
     TARGET_TESTONLY_FILTER_COMMAND_LINE_HELP
 
@@ skipping 113 matching lines @@
 
       if (!PrintConfig(config, what_to_print, !multiple_outputs))
         return 1;
     }
   }
 
   return 0;
 }
 
 }  // namespace commands