Usage: sed [-efinr] SED_CMD [FILE]...

Options:
	-e CMD	Add CMD to sed commands to be executed
	-f FILE	Add FILE contents to sed commands to be executed
	-i	Edit files in-place
	-n	Suppress automatic printing of pattern space
	-r	Use extended regex syntax

If no -e or -f is given, the first non-option argument is taken as the sed
command to interpret. All remaining arguments are names of input files; if no
input files are specified, then the standard input is read. Source files
will not be modified unless -i option is given.
