Slightly better docs for the convert_dict tool.

chrome/tools/convert_dict/convert_dict.cc

 // Copyright (c) 2006-2008 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.
 
 // This tool converts Hunspell .aff/.dic pairs to a combined binary dictionary
 // format (.bdic). This format is more compact, and can be more efficiently
 // read by the client application.
 //
 // We do this conversion manually before publishing dictionary files. It is not
 // part of any build process.
@@ skipping 58 matching lines @@
       }
     }
   }
 
   return true;
 }
 
 int PrintHelp() {
   printf("Usage: convert_dict <dicfile base name>\n\n");
   printf("Example:\n");
-  printf("  convert_dict en-US\nwill read en-US.dic / en-US.aff and\n");
-  printf("generate en-US.bdic\n\n");
+  printf("  $ convert_dict en-US\nwill read en-US.dic, en-US.dic_delta, and "

[brettw, 2011/01/20 23:49:58]

The addition of $ is confusing here since I normally ran it on Windows. Maybe
it's OK without it?

+         "en-US.aff and generate en-US.bdic\n\n");
   return 1;
 }
 
 }  // namespace
 
 #if defined(OS_WIN)
 int wmain(int argc, wchar_t* argv[]) {
 #else
 int main(int argc, char* argv[]) {
 #endif
   base::EnableTerminationOnHeapCorruption();
   if (argc != 2)
     return PrintHelp();
 
   base::AtExitManager exit_manager;
   icu_util::Initialize();
 
   FilePath file_base = FilePath(argv[1]);
 
   FilePath aff_path = file_base.ReplaceExtension(FILE_PATH_LITERAL(".aff"));
   printf("Reading %" PRFilePath " ...\n", aff_path.value().c_str());
   convert_dict::AffReader aff_reader(aff_path);
   if (!aff_reader.Read()) {
     printf("Unable to read the aff file.\n");
     return 1;
   }
 
   FilePath dic_path = file_base.ReplaceExtension(FILE_PATH_LITERAL(".dic"));
   printf("Reading %" PRFilePath " ...\n", dic_path.value().c_str());
+  // DicReader will also read the .dic_delta file.
   convert_dict::DicReader dic_reader(dic_path);
   if (!dic_reader.Read(&aff_reader)) {
     printf("Unable to read the dic file.\n");
     return 1;
   }
 
   hunspell::BDictWriter writer;
   writer.SetComment(aff_reader.comments());
   writer.SetAffixRules(aff_reader.affix_rules());
   writer.SetAffixGroups(aff_reader.GetAffixGroups());
@@ skipping 16 matching lines @@
   if (!out_file) {
     printf("ERROR writing file\n");
     return 1;
   }
   size_t written = fwrite(&serialized[0], 1, serialized.size(), out_file);
   CHECK(written == serialized.size());
   file_util::CloseFile(out_file);
 
   return 0;
 }