Opening tab separated file in Excel: Excel has detected that ‘file.txt’ is a SYLK file, but cannot load it

You try to open a tab separated file in Excel and get error ‘Excel has detected that ‘test.txt’ is a SYLK file, but cannot load it. Either the file has errors or it is not a SYLK file format. Click OK to try to open the file in a different format.’ The file looks something …