string.next is based on the character set in use


" ".next # => "!"

1.	Call next function from string class
2.	string.next adds a character when it reaches a boundary, or adds a digit or decimal place when appropriate
3.	Call next function on returning result from reverse
4.	Chain calls of next together
5.	next works for numbers represented as strings
6.	number.next
7.	next method from Integer.

string.next is based on the character set in use : next « String « Ruby