What this macro does is create an internal link that, when clicked, vanishes and is replaced with whatever is between the << replace >> and << endreplace >> tags. This could be useful if (just for starters) you want to have a passage that can be modified by clicking specific details inside it.

Copy the code in here: http://www.glorioustrainwrecks.com/files/TwineMacro-Replace.txt

Here is a usage example: You see <<replace "a half-eaten cake">> a plate of crumbs <<endreplace>>

Some notes:
* For those writing CSS: the < a > tag of the link has the class names "internalLink" and "replaceLink". It is immediately followed with a < span > tag with a class name of "replacement" and the style "display:none". Clicking the link removes it and changes the span's display style to "inline".
* Code inside << replace >> tags is only executed when you click the link.