How can I write a find:replace function for gender? [Snowman 1.3]

Hello, could someone explain how find:replace functions work in Snowman 1.3 I'd like to use it as means to assign a player's gender. The current code I'm working with looks something like this, and it doesn't make the writing process any easier.

I wish <% if (s.player_sex == "female") { %>she<% } %><% if (s.player_sex == "male") { %>he<% } %> was still here.