    # File utils.rb, line 408
            def editInPlace( file ) # :yields: line
                    raise "No block specified for editing operation" unless block_given?

                    tempName = "#{file}.#{$$}"
                    File::open( tempName, File::RDWR|File::CREAT, 0600 ) {|tempfile|
                            File::unlink( tempName )
                            File::open( file, File::RDONLY ) {|fh|
                                    fh.each {|line|
                                            newline = yield( line ) or next
                                            tempfile.print( newline )
                                    }
                            }

                            tempfile.seek(0)

                            File::open( file, File::TRUNC|File::WRONLY, 0644 ) {|newfile|
                                    newfile.print( tempfile.read )
                            }
                    }
            end