whitespace: Include empty final line in BoB empty match

* lisp/whitespace.el (whitespace-empty-at-bob-regexp): Include any
last line trailing whitespace in the BoB empty line match to ensure
that those characters get highlighted.

diff --git a/lisp/whitespace.el b/lisp/whitespace.el
index 4a8117b75e074cecd468f2a24435d85f47561db3..8146eff9b0a2760c4e93eea24755915beb72c708 100644 (file)
--- a/lisp/whitespace.el
+++ b/lisp/whitespace.el
@@ -730,7 +730,7 @@ Used when `whitespace-style' includes `indentation',
   :group 'whitespace)
 
 
-(defcustom whitespace-empty-at-bob-regexp "\\`\\(\\([ \t]*\n\\)+\\)"
+(defcustom whitespace-empty-at-bob-regexp "\\`\\([ \t\n]*\\(?:\n\\|$\\)\\)"
   "Specify regexp for empty lines at beginning of buffer.
 
 Used when `whitespace-style' includes `empty'."