[PATCH] emacs/show: force notmuch-show-buttonise-links to act on lines

[David Bremner]

This seems to fix a problem with emacs 25 creating partial buttons by
calling n-s-b-l with a region that does not include the whole button.
I'm not 100% sure it's legit to act outside the region passed by
jit-lock, but goto-address-fontify-region (where I borrowed the code
from) already does this, so this patch to not make things worse.
---
 emacs/notmuch-show.el | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

This makes the test suite pass with emacs 25 for me. If people think
this is sane, I'd like to do a bug fix release with this change.

diff --git a/emacs/notmuch-show.el b/emacs/notmuch-show.el
index f2487ab..643dee6 100644
--- a/emacs/notmuch-show.el
+++ b/emacs/notmuch-show.el
@@ -1174,13 +1174,15 @@ This also turns id:\"<message id>\"-parts and mid: links into
 buttons for a corresponding notmuch search."
   (goto-address-fontify-region start end)
   (save-excursion
-    (let (links)
-      (goto-char start)
-      (while (re-search-forward notmuch-id-regexp end t)
+    (let (links
+	  (beg-line (progn (goto-char start) (line-beginning-position)))
+	  (end-line (progn (goto-char end) (line-end-position))))
+      (goto-char beg-line)
+      (while (re-search-forward notmuch-id-regexp end-line t)
 	(push (list (match-beginning 0) (match-end 0)
 		    (match-string-no-properties 0)) links))
-      (goto-char start)
-      (while (re-search-forward notmuch-mid-regexp end t)
+      (goto-char beg-line)
+      (while (re-search-forward notmuch-mid-regexp end-line t)
 	(let* ((mid-cid (match-string-no-properties 1))
 	       (mid (save-match-data
 		      (string-match "^[^/]*" mid-cid)
-- 
2.9.3