meow-command: fix meow-visit bug on empty input (#602)

* fixed meow-visit bug

* new empty failed message

* fixed spacing

* fixed spacing

* replaced tabs by spaces

* removed extra lines

---------

meow-visit hangs when minibuffer input is empty. Adds a check for empty input in meow-visit and modifies the result message to indicate it was an empty search.

Co-authored-by: bunnyanon <bunnyanon@cock.li>

meow-command.el

@@ -1395,7 +1395,7 @@ To search backward, use \\[negative-argument]."
          (text (meow--prompt-symbol-and-words
                 (if arg "Visit backward: " "Visit: ")
                 (point-min) (point-max)))
-         (visit-point (meow--visit-point text reverse)))
+         (visit-point (if (string-empty-p text) nil (meow--visit-point text reverse))))
     (if visit-point
         (let* ((m (match-data))
                (marker-beg (car m))
@@ -1409,7 +1409,7 @@ To search backward, use \\[negative-argument]."
           (meow--ensure-visible)
           (meow--highlight-regexp-in-buffer text)
           (setq meow--dont-remove-overlay t))
-      (message "Visit: %s failed" text))))
+      (message "Visit: %s failed" (if (string-empty-p text) "<empty>" text)))))
 
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