--- include.txt
now including include2.txt
--- include2.txt
now including include3.txt
--- include3.txt
now including include.txt
back in include3.txt
--- !include3.txt
back in include2.txt
--- !include2.txt
back in include.txt
--- !include.txt
recinc1.txt
recinc2.txt
recinc3
recinc1.txt
"heinz" = "heinz"