Forte, 66 bytes
Updated for the new Interpreter
2PUT34:LET1=3 4PUT34:END 1PRINT "2PUT34:LET1=3 4PUT34:END 1PRINT "
Which, in order is:
1: Print the first half of the code. 2: Print a ", then set line 3 to be line 1. 3: Print the second half of the code again. 4: Print another ", then end the program.