Guard against faulty flow-filled emails

* lisp/mail/flow-fill.el (fill-flowed): Don't bug out if there's a
space at the end of the buffer.  This is probably not allowed in
the flow-fill specification, but has been observed in the wild.

diff --git a/lisp/mail/flow-fill.el b/lisp/mail/flow-fill.el
index f4b55031194869af07cdaa54cbabf28da1ccd38c..b357b3e25631a79ae6f9c3a614680817c683510d 100644 (file)
--- a/lisp/mail/flow-fill.el
+++ b/lisp/mail/flow-fill.el
@@ -157,7 +157,8 @@ lines."
           ;; Hack: Don't do the flowing on the signature line.
           (when (and (not (looking-at "-- $"))
                      (eq (char-before (line-end-position)) ?\s))
-            (while (eq (char-before (line-end-position)) ?\s)
+            (while (and (not (eobp))
+                        (eq (char-before (line-end-position)) ?\s))
               (end-of-line)
               (when delete-space
                 (delete-char -1))