Continuation lines for persistent articles

[TSUCHIYA Masatoshi <tsuchiya@namazu.org>]

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Hello, Gnus developers.

I found the bug that continuation lines are not treated for persistent
articles.  For example, when an article whose subject consists of
continuation lines is entered to cache, its subject is truncated to
the first new-line.  So, I propose the following change.

2002-10-13  TSUCHIYA Masatoshi  <tsuchiya@namazu.org>

	* gnus-cache.el (gnus-cache-possibly-enter-article): Fold
	continuation lines and turn TAB into SPC before parsing.


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--- gnus-cache.el.orig	2002-08-05 16:30:26.000000000 +0900
+++ gnus-cache.el	2002-10-13 14:21:41.000000000 +0900
@@ -179,6 +179,11 @@
 	    (when (> (buffer-size) 0)
 	      (let ((coding-system-for-write gnus-cache-coding-system))
 		(gnus-write-buffer file))
+	      (save-restriction
+		(nnheader-narrow-to-headers)
+		(nnheader-ms-strip-cr)
+		(nnheader-fold-continuation-lines)
+		(subst-char-in-region (point-min) (point-max) ?\t ? ))
 	      (setq headers (nnheader-parse-head t))
 	      (mail-header-set-number headers number)
 	      (gnus-cache-change-buffer group)

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I am worry that all functions which call nnheader-parse-head() must
fold continuation lines before calling it.  If this observation is
right, a better approach would make nnheader-parse-head() fold them.

-- 
TSUCHIYA Masatoshi