[elpa] 89/299: Fix a bug in font-latex-add-to-syntax-alist.

[Stefan Monnier]

monnier pushed a commit to branch externals/auctex
in repository elpa.

commit 0ca09e7a7a575c0485b18cb41b7dcccaf6527252
Author: Leo Liu <address@hidden>
Date:   Sun Sep 5 15:49:16 2010 +0100

    Fix a bug in font-latex-add-to-syntax-alist.
    
    * font-latex.el (font-latex-add-to-syntax-alist): Fix a bug in
    `font-latex-add-to-syntax-alist' where it modified both the buffer
    local and global value of `font-latex-syntax-alist'.
---
 ChangeLog     |    4 ++++
 font-latex.el |    3 ++-
 2 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index ce0f36a..cc198d2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -11,6 +11,10 @@
        * tex.el (TeX-math-input-method-off-regexp): Improve and fix typo.
        See bug http://permalink.gmane.org/gmane.emacs.auctex.devel/2468.
 
+       * font-latex.el (font-latex-add-to-syntax-alist): Fix a bug in
+       `font-latex-add-to-syntax-alist' where it modified both the buffer
+       local and global value of `font-latex-syntax-alist'.
+
 2013-04-08  Tassilo Horn  <address@hidden>
 
        * latex.el (LaTeX-style-list): Correct docstring.
diff --git a/font-latex.el b/font-latex.el
index 62aae93..ba3d79a 100644
--- a/font-latex.el
+++ b/font-latex.el
@@ -1125,7 +1125,8 @@ end up in `font-lock-defaults'.  Each entry in LIST 
should be a
 cons pair as expected by `font-lock-defaults'.  The function also
 triggers Font Lock to recognize the change."
   (make-local-variable 'font-latex-syntax-alist)
-  (nconc font-latex-syntax-alist list)
+  (set (make-local-variable 'font-latex-syntax-alist)
+       (append font-latex-syntax-alist list))
 ;; FIXME: Are there situations where we need to alter `font-lock-defaults'
 ;; directly?
 ;;   (dolist (entry list)