hi
foo
bar
baz
hello
a
hello
b
args kwargs
sh script
source file src/builtins/exec.rs
source file src/builtins/exit.rs
source file src/builtins/export.rs
append 'ab' into file
append ',' into file
append ' ' into file
append 'xy' into file
bye
===1===
hi
foo
bar
baz
hello
a
hello
b
args kwargs
sh script
bye
===2===
before for-if
found it
after for-if

before for-while
hello foo
counter = 18
counter = 19
bye foo
hello bar
bye bar
after for-while
===3===
xxx begins with 
xxx now is wip
xxx now is final
===4===
1
3
5
6
8
9
a
b
===5===
zero round
a1
b1
c1
a2
b2
c2
a3
b3
c3
first round
a1
b1
c1
a3
b3
c3
second round
a1
c1
a2
c2
a3
c3
===6===
foo
first round
a1
b1
c1
a3
b3
c3
second round
a1
a2
a3
===7===
- foo
- bar
===8===