cider-clojuredocs: prevent redundant prompt for a symbol

Closes clojure-emacs#3163

Author: benjamin-asdf

Diff for: CHANGELOG.md

@@ -22,6 +22,7 @@
 * [#3145](https://github.com/clojure-emacs/cider/pull/3145): Allow fallback to other `xref` backends if cider-nrepl is not loaded.
 * [#3148](https://github.com/clojure-emacs/cider/pull/3148): Fix eval result overlays at point inheriting the faces of following text.
 * [#3133](https://github.com/clojure-emacs/cider/issues/3133): Respect `cider-injected-middleware-version`.
+* [#3163](https://github.com/clojure-emacs/cider/pull/3163): `cider-clojuredocs`: prevent redundant prompt for a symbol.
 
 ## 1.2.0 (2021-12-22)
 

Diff for: cider-clojuredocs.el

@@ -145,7 +145,11 @@ opposite of what that option dictates."
   (let ((docs (cider-sync-request:clojuredocs-lookup (cider-current-ns) sym)))
     (pop-to-buffer (cider-create-clojuredocs-buffer (cider-clojuredocs--content docs)))
     ;; highlight the symbol in question in the docs buffer
-    (highlight-regexp (cadr (split-string sym "/")) 'bold)))
+    (highlight-regexp
+     (regexp-quote
+      (or (cadr (split-string sym "/"))
+          sym))
+     'bold)))
 
 ;;;###autoload
 (defun cider-clojuredocs (&optional arg)