bug#25535: [PATCH] Update extant reference to ert--mismatch in documentation

[Vladimir Panteleev]

The commit "Stop reimplementing a bunch of cl- functions in ert"
removed ert--mismatch from ert.el, but did not remove references to it
in the ert documentation.

* doc/misc/ert.texi (Useful Techniques when Writing Tests): Replace
'ert--mismatch' references with its cl-lib replacement, 'cl-mismatch'.
---
 doc/misc/ert.texi | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/doc/misc/ert.texi b/doc/misc/ert.texi
index b07cb0be49..4a2c29dcb9 100644
--- a/doc/misc/ert.texi
+++ b/doc/misc/ert.texi
@@ -551,15 +551,15 @@ Useful Techniques
 
 @lisp
 (ert-deftest ert-test-mismatch ()
-  (should (eql (ert--mismatch "" "") nil))
-  (should (eql (ert--mismatch "" "a") 0))
-  (should (eql (ert--mismatch "a" "a") nil))
-  (should (eql (ert--mismatch "ab" "a") 1))
-  (should (eql (ert--mismatch "Aa" "aA") 0))
-  (should (eql (ert--mismatch '(a b c) '(a b d)) 2)))
+  (should (eql (cl-mismatch "" "") nil))
+  (should (eql (cl-mismatch "" "a") 0))
+  (should (eql (cl-mismatch "a" "a") nil))
+  (should (eql (cl-mismatch "ab" "a") 1))
+  (should (eql (cl-mismatch "Aa" "aA") 0))
+  (should (eql (cl-mismatch '(a b c) '(a b d)) 2)))
 @end lisp
 
-This test calls the function @code{ert--mismatch} several times with
+This test calls the function @code{cl-mismatch} several times with
 various combinations of arguments and compares the return value to the
 expected return value.  (Some programmers prefer @code{(should (eql
 EXPECTED ACTUAL))} over the @code{(should (eql ACTUAL EXPECTED))}
-- 
2.11.0