Add an optional testfn parameter to assoc

* src/fns.c (assoc): New optional testfn parameter used for comparison
when provided.
* test/src/fns-tests.el (test-assoc-testfn): Add tests for the new
'testfn' parameter.
* src/buffer.c:
* src/coding.c:
* src/dbusbind.c:
* src/font.c:
* src/fontset.c:
* src/gfilenotify.c:
* src/image.c:
* src/keymap.c:
* src/process.c:
* src/w32fns.c:
* src/w32font.c:
* src/w32notify.c:
* src/w32term.c:
* src/xdisp.c:
* src/xfont.c: Add a third argument to Fassoc calls.
* etc/NEWS:
* doc/lispref/lists.texi: Document the new 'testfn' parameter.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/fontset.c b/src/fontset.c
index 850558b08a0..74018060b85 100644
--- a/src/fontset.c
+++ b/src/fontset.c
@@ -1186,7 +1186,7 @@ fs_query_fontset (Lisp_Object name, int name_pattern)
     {
       tem = Frassoc (name, Vfontset_alias_alist);
       if (NILP (tem))
-        tem = Fassoc (name, Vfontset_alias_alist);
+        tem = Fassoc (name, Vfontset_alias_alist, Qnil);
       if (CONSP (tem) && STRINGP (XCAR (tem)))
         name = XCAR (tem);
       else if (name_pattern == 0)