Erubis is a pure Ruby implementation of eRuby. It has the following
features.

* Very fast, almost three times faster than ERB and even as fast as
eruby (implemented in C)

* Auto escaping (sanitizing) support

* Auto trimming spaces around '<% %>'

* Embedded pattern changeable (default '<% %>')

* Multi-language support (Ruby/PHP/C/Java/Scheme/Perl/Javascript)

* Context object available and easy to combine eRuby template with
YAML datafile

* Easy to expand in subclass, for example:

- Print statement support

- Lines starting with percent character ('%') support

- Another embedded pattern support

- etc...

Erubis supports not only Ruby but also PHP, C, Java, Scheme, Perl, and
Javascript. You can embed these language code into your document and
compile it into target program code.