cs behave?
<p><blockquote><b>A.</b>
These symptoms indicate that perhaps emacs has lost track of the boundaries
between noweb chunks, perhaps material in documentation chunks is
confusing the auto-indenter, or perhaps both.
As of Emacs&nbsp;21 in 2008, you can now easily afford to fix these
problems using scary Emacs macros:
<pre>
  (defun my-newline-and-indent () 
    "Newline and indent that works better with noweb mode"
    (interactive "*")
    (if (and (boundp 'noweb-mode) noweb-mode)
        (save-res