The comment tag provides a way to exclude source text from the rendered text. The comment tag is a simple non-empty tag that inserts no text. Further, the source enclosed by a comment tag is not rendered. Comment tags can be used to provide explanatory text or to disable parts of the source. Comment tags can be nested. Here is an example:
<!--#call updateData-->
The data have been updated.
<!--#comment-->
This comment is used to disable logging.
<!--#comment-->The following call records that updates were made
<!--#/comments-->
<!--#call logUpdates-->
<!--#/comment-->