Comment fixes.

Projects/Src/Setup.Install.pas

@@ -1558,7 +1558,7 @@ var
           AllowFileToBeDuplicated := False;
         end;
 
-        { Extract or copy the file to a temporary file. Create the destination
+        { Download or extract or copy the file to a temporary file. Create the destination
           file's directory if it didn't already exist. }
         LastOperation := SetupMessages[msgErrorCreatingTemp];
         TempFile := GenerateUniqueName(DisableFsRedir, PathExtractPath(DestFile), '.tmp');
@@ -2178,7 +2178,7 @@ var
                   InternalError('Unexpected SkipIfSourceDoesntExist flag');
                 if not(foCustomDestName in CurFile^.Options) then
                   InternalError('Expected CustomDestName flag');
-                { CurFile^.DestName now includes a a filename, see TSetupCompiler.EnumFilesProc.ProcessFileList }
+                { CurFile^.DestName now includes a filename, see TSetupCompiler.EnumFilesProc.ProcessFileList }
                 ProcessFileEntry(CurFile, DisableFsRedir, SourceWildcard, ExpandConst(CurFile^.DestName),
                   nil, ExpectedBytesLeft, ConfirmOverwriteOverwriteAll, PromptIfOlderOverwriteAll,
                   WarnedPerUserFonts, nil);

Projects/Src/Setup.MainFunc.pas

@@ -1870,7 +1870,7 @@ begin
           if foDownload in CurFile^.Options then begin
             if not(foCustomDestName in CurFile^.Options) then
               InternalError('Expected CustomDestName flag');
-            { CurFile^.DestName now includes a a filename, see TSetupCompiler.EnumFilesProc.ProcessFileList }
+            { CurFile^.DestName now includes a filename, see TSetupCompiler.EnumFilesProc.ProcessFileList }
             if not EnumFilesProc(DisableFsRedir, ExpandConst(CurFile^.DestName), Param) then
               Exit(False);
           end else begin