Fix shortdoc-tests failure with respect to regexp-opt-charset

* test/lisp/emacs-lisp/shortdoc-tests.el (regexp-opt): Require.
`regexp-opt-charset` is not autoloaded, and whether `regexp-opt` is
preloaded is configuration-dependent.

diff --git a/test/lisp/emacs-lisp/shortdoc-tests.el b/test/lisp/emacs-lisp/shortdoc-tests.el
index 914aee633ee7a584068de35fd62284f83ef89ade..516d095767f103a9f08053550d3963671edc2669 100644 (file)
--- a/test/lisp/emacs-lisp/shortdoc-tests.el
+++ b/test/lisp/emacs-lisp/shortdoc-tests.el
@@ -22,6 +22,7 @@
 (require 'ert)
 (require 'shortdoc)
 (require 'subr-x) ; `string-pad' in shortdoc group needed at run time
+(require 'regexp-opt)    ; `regexp-opt-charset' not autoloaded
 
 (defun shortdoc-tests--tree-contains (tree fun)
   "Whether TREE contains a call to FUN."