Hi all,
Currently in HEAD a file tangled with org-babel-tangle does not detangle with org-babel-detangle.
The problem is that the chunk delimiters in the tangled file are cushioned with empty lines whereas the same chunk in the Org file is not. So when 'org-babel-detangle' tries to determine the beginning and end of the chunk it includes the spaces which causes it to error out when trying to re-insert the chunk in the Org file because the size of the chunks don't match.
This is a simple fix and I would have submitted a patch but I don't know if the problem is that org-tangle is adding empty lines or if the detangle process should be taking that into account. Let me know which and I'll submit a patch.
This can be reproduced in the following way:
Tangling the following snippet:
* Test Tangle
#+begin_src sh :tangle /tmp/test-tangle.txt :comments yes
hello world
#+end_src
produces:
# [[file:~/WorkingFiles/Org.org::*Test%20Tangle][Test\ Tangle:1]]
hello world
# Test\ Tangle:1 ends here
Detangling the same file highlights the code chunk in the Org file and leaves an error message:
"progn: End of buffer" in the *Messages* buffer.
Thanks!
-deech