Make link_text parameter a pointer to str in append hyperlink function
Make link_text parameter a pointer to str in append hyperlink function

This change allows us to get rid of unnecessary Ruby String instance
instantiations in a couple of different places.

Signed-off-by: Wincent Colaiuta <c76ac2e9cd86441713c7dfae92c451f3e6d17fdc@wincent.com>

geni/wikitext,wincent/wikitext,barnaclebarnes/wikitext,geni/wikitext,barnaclebarnes/wikitext,barnaclebarnes/wikitext,geni/wikitext,wincent/wikitext