(outline-process-exposed): Fix error format string.

diff --git a/lisp/allout.el b/lisp/allout.el
index 8302dc5b20702946fde4b39c84e001a9c8ba65b4..db41d4af169d0992fd7febe080dcde408e3177ec 100644 (file)
--- a/lisp/allout.el
+++ b/lisp/allout.el
@@ -3265,9 +3265,8 @@ representations of topic entries produced by outline-listify-exposed."
          ;; Specified but not a buffer - get it:
          (let ((got (get-buffer frombuf)))
            (if (not got)
-               (error (concat "outline-process-exposed: source buffer "
-                              frombuf
-                              " not found."))
+               (error "outline-process-exposed: source buffer %s not found."
+                      frombuf)
              (setq frombuf got))))
     ;; not specified - default it:
     (setq frombuf (current-buffer)))