From mboxrd@z Thu Jan  1 00:00:00 1970
From: Charles Berry <ccberry@ucsd.edu>
Subject: [bug][babel] noweb gotcha
Date: Wed, 11 Jun 2014 03:30:44 +0000 (UTC)
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The following 

,----
| #+PROPERTY: tangle yes
| 
| #+NAME: print-abc
| #+BEGIN_SRC emacs-lisp
| (format 
| "<<%s>>" "abc")
| #+END_SRC
| 
| #+NAME: print-def
| #+BEGIN_SRC emacs-lisp
| (concat
| "<<" "def" ">>")
| #+END_SRC
| 
| #+BEGIN_SRC emacs-lisp :noweb yes
| <<print-abc>>
| <<print-def>>
| #+END_SRC
`----



tangles as 

,----
| (format 
| "<<%s>>" "abc")
| 
| (concat
| "<<" "def" ">>")
| 
| (format 
| "<<%s>>" "abc")
| (concat
| "")
`----


Note that ""<<" "def" ">>" disappeared from (concat ...).

FWIW, adding quotes inside the constant string in org-babel-noweb-wrap:


"\\([^ \"\t\n][^\"]+?[^ \"\t]\\|[^ \"\t\n]\\)"

fixes this instance.


HTH,

Chuck