Fix lint warnings

Author: yuhan0

cider-debug.el

@@ -158,7 +158,8 @@ configure `cider-debug-prompt' instead."
   "Used as an overlay's before-string prop to place a fringe arrow.")
 
 (defun cider--debug-display-result-overlay (value caught)
-  "Place an overlay at point displaying VALUE."
+  "Place an overlay at point displaying VALUE.
+When CAUGHT is non-nil, display it as an error message overlay."
   (when cider-debug-use-overlays
     ;; This is cosmetic, let's ensure it doesn't break the session no matter what.
     (ignore-errors