Assignment name  : rostring
Expected files   : rostring.c
Allowed functions: write, malloc, free
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Write a program that takes a string and displays this string after rotating it
one word to the left.

Thus, the first word becomes the last, and others stay in the same order.

A "word" is defined as a part of a string delimited either by spaces/tabs, or
by the start/end of the string.

Words will be separated by only one space in the output.

If there's less than one argument, the program displays \n.

Example:

$>./rostring "abc   " | cat -e
abc$
$>
$>./rostring "Que la      lumiere soit et la lumiere fut"
la lumiere soit et la lumiere fut Que
$>
$>./rostring "     AkjhZ zLKIJz , 23y"
zLKIJz , 23y AkjhZ
$>
$>./rostring | cat -e
$
$>