Block-level enable and disable debug
with_debug  true_or_false (boolean)
Similar to use_debug except only applies to code within supplied do/end block. Previous debug value is restored after block.
Introduced in v2.0
Example
 
  | # Example 1 | 
  | 
use_debug true
play 80
with_debug false do
 
  play 50
  sleep 1
  play 72
end
play 90
 | 
# Turn on debugging:
 
# Debug message is sent
 
#Debug is now disabled
# Debug message is not sent
 
# Debug message is not sent
 
# Debug is re-enabled
# Debug message is sent
 |