A transform block consists of lines, where every 2 lines is a transform
The first line of each transform is a pattern, and the second is the
replacement.  These are passed to re.sub, like so:
re.sub(pattern, replacement, page_data)

Here is the set of transforms for the [[DocMarkupVariables]] page:

Ignore the trailbar

{{{transforms
The time is.*
The time is XXXX
}}}