(Default Coding Systems): Document about the

return value `undecided'.

diff --git a/lispref/nonascii.texi b/lispref/nonascii.texi
index dd0f15c817e1ba76550cc57225a183fc5475dab8..a8f45e9dd2049dcc615c4ec558cd7e3313d27b22 100644 (file)
--- a/lispref/nonascii.texi
+++ b/lispref/nonascii.texi
@@ -1031,6 +1031,9 @@ argument, a list of all arguments passed to
 @code{find-operation-coding-system}.  It must return a coding system
 or a cons cell containing two coding systems.  This value has the same
 meaning as described above.
+
+If @var{coding} (or what returned by the above function) is
+@code{undecided}, the normal code-detection is performed.
 @end defvar
 
 @defvar process-coding-system-alist