bug#37887: 27.0.50; icalendar-export-region: multiline Desc not handled

[Rajeev Narang via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

icalendar-export-region does not export multi-line Desc as it is imported by icalendar-import-file.  The following patch fixes the issue.

diff --git a/lisp/calendar/icalendar.el b/lisp/calendar/icalendar.el
index 1186ced3fb..1f4e582aa5 100644
--- a/lisp/calendar/icalendar.el
+++ b/lisp/calendar/icalendar.el
@@ -1244,7 +1244,7 @@ icalendar--parse-summary-and-rest
                      (concat "\\(" icalendar-import-format-uid "\\)??"))))
 	;; Need the \' regexp in order to detect multi-line items
         (setq s (concat "\\`"
-                        (replace-regexp-in-string "%s" "\\(.*?\\)" s nil t)
+                        (replace-regexp-in-string "%s" "\\([^z-a]*?\\)" s nil t)
                         "\\'"))
         (if (string-match s summary-and-rest)
             (let (cla des loc org sta url uid) ;; sum



In GNU Emacs 27.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.5, cairo version 1.16.0)
 of 2019-10-20 built on hp
Repository revision: 30deac84c4168a6315a08a0dd85f6dde9b9df439
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12004000
System Description: Debian GNU/Linux 10 (buster)

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