Quoting of words can be used to suppress the meaning of
special characters (like the dollar sign, curly braces,
etc.). While quoting with ``'' only suppresses the special
meaning of space (as a word separator), curly braces
suppress the meaning of all special characters. Special
characters are e.g. square brackets, the dollar sign or
backslash sequences (like `` n''). Quoting
a parameter with curly braces delays its interpretation to
the execution of the called command.