synch1.m4:1:This is a test for multi MARK1 synch1.m4:2:line synchronization stuff MARK2 synch1.m4:3:# Let's include comments to see MARK3 synch1.m4:4:quoted string MARK4 synch1.m4:7:Return to normal MARK5 synch1.m4:11:And let's see where we are now. MARK6 synch1.m4:13:MARK7