Unix Shells: Bash, Fish, Ksh, Tcsh, Zsh - HyperpolyglotShells read input up to an unquoted newline and then execute it. An unquoted backslash followed by a newline are discarded and cause the shell to wait for more input. The backslash and newline are discarded before the shell tokenizes the string, so long lines can be split anywhere outside of single quotes, even in the middle of command names and variable names. In the shell grammar, lists contain
