0 400   0   # Nested elements and other complex cases
 1 400   0   
 0 400   0   # String with backtick inclusion
 0 400   0   "x`ls`"
 0 400   0   # Nested string
 0 400   0   "x`ls "*.c"`"
 0 400   0   # Not terminated at first "
 0 400   0   "x`ls" # "`" #
 1 400   0   
 0 400   0   # String with command inclusion
 0 400   0   "x$(ls)"
 1 400   0   
 0 400   0   # Nested command
 0 400   0   $(ls -la$(ls *.c))
 1 400   0   
 0 400   0   # Check strings and backticks in command
 0 400   0   echo $('ls' "." `ls` $'.' $".")
 1 400   0   
 0 400   0   # $( not terminated by ) if contains unterminated string
 0 400   0   $('x) # ') #
 0 400   0   $("x) # ") #
 0 400   0   $(`x) # `) # Bash doesn't like this
 0 400   0   $($'x) # ') #
 0 400   0   $($"x) # ") #
 1 400   0   
 0 400   0   # Parameter expansion
 0 400   0   var=abcdef
 0 400   0   sub=abc
 0 400   0   rep='& '
 0 400   0   echo ${var/$sub/"${rep}}"} #
 1 400   0   
 0 400   0   # '$' in variable
 0 400   0   echo $$PID
 0 400   0   echo $var${var}
 1 400   0   
 0 400   0   # Here-doc with internal elements
 2 400   0 + cat <<EOF
 0 401   0 | 	$scalar
 0 401   0 | 	${var}
 0 401   0 | 	$((1+2))
 0 401   0 | 	$(pwd)
 0 401   0 | 	`pwd`
 0 401   0 | EOF
 1 400   0   
 0 400   0   # Quoted delimiter treats here-doc as simple string
 2 400   0 + cat <<"EOF"
 0 401   0 | 	$scalar
 0 401   0 | 	${var}
 0 401   0 | 	$((1+2))
 0 401   0 | 	$(pwd)
 0 401   0 | 	`pwd`
 0 401   0 | EOF
 1 400   0   
 0 400   0   # Escaped same as quoted
 2 400   0 + cat <<\EOF
 0 401   0 | 	$scalar
 0 401   0 | EOF
 1 400   0   
 0 400   0   # Nesting
 0 400   0   echo "$((1 + 2))" #
 0 400   0   echo "$[1 + 2]" #
 1 400   0   
 0 400   0   # Multiple nesting levels
 0 400   0   $(ls -la$(ls $(c) $'*.c' ` $(${s})`))
 1 400   0   
 0 400   0   # Multi-line
 0 400   0   $(ls |
 0 400   0   more)
 1 400   0   
 0 400   0   $(
 0 400   0   `x`
 0 400   0   "x"
 0 400   0   `ls`
 0 400   0   $'x'
 0 400   0   $"x"
 0 400   0   )
 0 400   0   #end -- checks termination of previous
 0 400   0