Improve code style a bit

Author: bbatsov

cider-eldoc.el

@@ -72,7 +72,7 @@ POS is the index of the currently highlighted argument."
            (prog1
                (if (or (= (1+ i) pos)
                        (and rest-pos
-                            (> (+ 1 i) rest-pos)
+                            (> (1+ i) rest-pos)
                             (> pos rest-pos)))
                    (propertize argstr 'face
                                'eldoc-highlight-function-argument)

cider-stacktrace.el

@@ -281,7 +281,7 @@ hidden count."
           (unless (get-text-property (point) 'collapsed)
             (let* ((flags (get-text-property (point) 'flags))
                    (hide (if (seq-intersection filters flags) t nil)))
-              (when hide (setq hidden (+ 1 hidden)))
+              (when hide (cl-incf hidden))
               (put-text-property (point) (line-beginning-position 2) 'invisible hide)))
           (forward-line 1))
         (setq cider-stacktrace-hidden-frame-count hidden)))