The command language for our LCD panel is designed such that each command ends with with newline character.
For instance, a newline will terminate the search and accept the line, thereby executing the command from the history list.
If, on the other hand, the newline branch is taken, the next delimiter is taken as the one following the ALL.
Two adjacent newline s indicate a null pat- tern.
This command must always be terminated by a newline, even when -n is specified.