(plus aditional flags, if provided)
and forces tagging of output lines by file name. If no files
are listed, it searches all files matching
+.B *.b *.c *.C *.h *.l *.m *.s *.y
.B *.asm *.cc *.cs *.lx *.cgi *.pl
.B *.py *.tex *.ms *.java *.xy *.go
.B *.goc