Responsive HTML5 - Search Stripping Brackets () From Results

Okay, I have this weird issue using the search on a compiled responsive HTML5 doc... I'm writing techincal docs for a programming language, which means I have lines of code on the page like:

sprite_get_texture(spr_Background, 0);

However, using the example above, if I do a seacrh for the function sprite_get:texture, the results have the () stripped from them so it looks like this:

sprite_get_texture spr_Background, 0 ;

Here are is an image that illustrates the issue better:

You'll notice that it's stripping the brackets from ALL code in the page, not just the function that I'm searching.

I have NO idea why it's doing this, let alone how it can be fixed, so any help here would be appreciated!