Ubuntu update failed, so the ubuntu software center cannot be opened.

Ubuntu update failed, so that the ubuntu software center cannot open the solution. update failed information: E: Malformed line 59 in source list/etc/apt/sources. list (dist parse) Issue-Update manager not functioning, does not read the complete packages, gets error-www.2cto.com cocould not initialize the package informationAn unresolvable problem occurred while initializing the package information. please report this bug against the 'Update-manager' package and inclu De the following error message: 'e: Malformed line 59 in source list/etc/apt/sources. list (dist parse) 'solution: gksudo gedit/etc/apt/sources. list open the file, clear all third-party software sources, and restart the Software Center. OK! Author hadahuluwa