Truncates a string to a specified length.
input string
output string length (including ending)
custom ending (default: ...)
...
truncated string
var out = truncate( 'beep boop', 7 ); // returns 'beep...'
var out = truncate( 'beep boop', 7, '|' ); // returns 'beep b|'
Truncates a string to a specified length.