:sig
String join(StringList l, String delim = "\n")

:params
l : list of strings to be joined
delim : delimiter (defaults to newline character)
return value : a string containing items joined by 'delim'

:see
>string

:content
Joins all strings in `l` into a single `String`.

The delimiter is inserted between items. If `delim` is omitted, the default separator is a newline character.

Related:

- PHP: `implode()`
- JavaScript / Node.js: `Array.prototype.join()`