Syntax:
#breakpoint
#breakpoint is a debugging tool that tells the parser to stop
parsing at a specific point. All source code from that point on will be ignored.
The difference between #breakpoint and #stop is that
#stop occurs in normal templates (e.g., inside an #if) but
#breakpoint is used only when debugging Cheetah. Another difference is
that #breakpoint operates at compile time, while #stop is
executed at run time while filling the template.